diff --git a/src/msr2data.cpp b/src/msr2data.cpp
index dac2a5ad..79a95b09 100644
--- a/src/msr2data.cpp
+++ b/src/msr2data.cpp
@@ -68,7 +68,7 @@ using namespace boost::algorithm;
  */
 bool isNumber(const string &s)
 {
-  unsigned int number;
+  unsigned int number(0);
   try {
     number = boost::lexical_cast<unsigned int>(s);
     return true;
@@ -123,8 +123,10 @@ void msr2data_syntax()
   cout << endl << "              the successive files are generated using the musrfit output from the preceding runs";
   cout << endl << "       msr-<template> : same as above without calling musrfit";
   cout << endl << "              In case any fitting option is present, this option is ignored!";
-  cout << endl << "       -k : if fitting is used, pass the option --keep-mn2-output to musrfit";
-  cout << endl << "       -t : if fitting is used, pass the option --title-from-data-file to musrfit";
+  cout << endl << "       -k, --keep-mn2-output : if fitting is used, pass the option --keep-mn2-output to musrfit";
+  cout << endl << "       -t, --title-from-data-file : if fitting is used, pass the option --title-from-data-file to musrfit";
+  cout << endl << "       -e, --estimateN0: estimate N0 for single histogram fits.";
+  cout << endl << "       -p, --per-run-block-chisq: will per run block chisq to the msr-file.";
   cout << endl;
   cout << endl << "       global : switch on the global-fit mode";
   cout << endl << "              Within that mode all specified runs will be united in a single msr file!";
@@ -216,7 +218,10 @@ string msr2data_validArguments(const vector<string> &arg)
 
   for (vector<string>::const_iterator iter(arg.begin()); iter != arg.end(); ++iter) {
     if ( (!iter->compare("header")) || (!iter->compare("noheader")) || (!iter->compare("nosummary")) \
-      || (!iter->substr(0,3).compare("fit")) || (!iter->compare("-k")) || (!iter->compare("-t")) \
+      || (!iter->substr(0,3).compare("fit")) || (!iter->compare("-k")) || (!iter->compare("--keep-mn2-output")) \
+      || (!iter->compare("-t")) || (!iter->compare("--title-from-data-file")) \
+      || (!iter->compare("-e")) || (!iter->compare("--estimateN0")) \
+      || (!iter->compare("-p")) || (!iter->compare("--per-run-block-chisq")) \
       || (!iter->compare("data")) || (!iter->substr(0,4).compare("msr-")) || (!iter->compare("global")) \
       || (!iter->compare("global+")) || (!iter->compare("global+!")) || (!iter->compare("new")) \
       || !iter->compare("paramList") )
@@ -265,6 +270,7 @@ string msr2data_outputfile(vector<string> &arg, bool db = true)
       if (!iter->compare("-o")) {
         if ((iterNext != arg.end()) && (iterNext->compare("header")) && (iterNext->compare("noheader")) && (iterNext->compare("nosummary")) \
             && (iterNext->substr(0,3).compare("fit")) && (iterNext->compare("-k")) && (iterNext->compare("-t")) \
+            && (iterNext->compare("-e")) && (iterNext->compare("-p")) \
             && (iterNext->compare("data")) && (iterNext->substr(0,3).compare("msr")) && (iterNext->compare("global")) \
             && (iterNext->compare("global+")) && (iterNext->compare("global+!")) && (iterNext->compare("new"))) {
           outputFile = *iterNext;
@@ -741,10 +747,14 @@ int main(int argc, char *argv[])
 
   // check if any options should be passed to musrfit
   if (temp) {
-    if (!msr2data_useOption(arg, "-k"))
+    if (!msr2data_useOption(arg, "-k") || !msr2data_useOption(arg, "--keep-mn2-output"))
       musrfitOptions.append("-k ");
-    if (!msr2data_useOption(arg, "-t"))
+    if (!msr2data_useOption(arg, "-t") || !msr2data_useOption(arg, "--title-from-data-file"))
       musrfitOptions.append("-t ");
+    if (!msr2data_useOption(arg, "-e") || !msr2data_useOption(arg, "--estimateN0"))
+      musrfitOptions.append("-e ");
+    if (!msr2data_useOption(arg, "-p") || !msr2data_useOption(arg, "--per-run-block-chisq"))
+      musrfitOptions.append("-p ");
   }
 
   // if no fitting should be done, check if only the input files should be created
diff --git a/src/musredit/PAdmin.cpp b/src/musredit/PAdmin.cpp
index 2ab1e9b2..c097fdfb 100644
--- a/src/musredit/PAdmin.cpp
+++ b/src/musredit/PAdmin.cpp
@@ -294,6 +294,7 @@ bool PAdminXMLParser::characters(const QString& str)
         flag = true;
       else
         flag = false;
+      fAdmin->fMsr2DataParam.estimateN0 = flag;
       fAdmin->setEstimateN0Flag(flag);
       break;
     case eChisqPreRunBlock:
@@ -301,6 +302,7 @@ bool PAdminXMLParser::characters(const QString& str)
         flag = true;
       else
         flag = false;
+      fAdmin->fMsr2DataParam.perRunBlockChisq = flag;
       fAdmin->setChisqPerRunBlockFlag(flag);
       break;
     case eRecentFile:
@@ -631,8 +633,6 @@ PAdmin::PAdmin() : QObject()
   fEstimateN0         = true;
   fChisqPreRunBlock   = false;
 
-  fMsr2DataParam.firstRun = -1;
-  fMsr2DataParam.lastRun  = -1;
   fMsr2DataParam.runList  = QString("");
   fMsr2DataParam.runListFileName = QString("");
   fMsr2DataParam.msrFileExtension = QString("");
@@ -641,10 +641,12 @@ PAdmin::PAdmin() : QObject()
   fMsr2DataParam.writeDbHeader = true;
   fMsr2DataParam.ignoreDataHeaderInfo = false;
   fMsr2DataParam.keepMinuit2Output = false;
+  fMsr2DataParam.estimateN0 = fEstimateN0;
   fMsr2DataParam.writeColumnData = false;
   fMsr2DataParam.recreateDbFile = false;
   fMsr2DataParam.chainFit = true;
   fMsr2DataParam.openFilesAfterFitting = true;
+  fMsr2DataParam.perRunBlockChisq = fChisqPreRunBlock;
   fMsr2DataParam.titleFromDataFile = true;
   fMsr2DataParam.createMsrFileOnly = false;
   fMsr2DataParam.fitOnly = false;
diff --git a/src/musredit/PMsr2DataDialog.cpp b/src/musredit/PMsr2DataDialog.cpp
index b2c52a48..1e997c73 100644
--- a/src/musredit/PMsr2DataDialog.cpp
+++ b/src/musredit/PMsr2DataDialog.cpp
@@ -54,18 +54,6 @@ PMsr2DataDialog::PMsr2DataDialog(PMsr2DataParam *msr2DataParam, const QString he
 
   fRunTag = -1;
 
-  fFirst_lineEdit->setValidator( new QIntValidator(fFirst_lineEdit) );
-  if (fMsr2DataParam->firstRun != -1) {
-    str = QString("%1").arg(fMsr2DataParam->firstRun);
-    fFirst_lineEdit->setText(str);
-  }
-
-  fLast_lineEdit->setValidator( new QIntValidator(fLast_lineEdit) );
-  if (fMsr2DataParam->lastRun != -1) {
-    str = QString("%1").arg(fMsr2DataParam->lastRun);
-    fLast_lineEdit->setText(str);
-  }
-
   if (!fMsr2DataParam->runListFileName.isEmpty()) {
     fRunListFileName_lineEdit->setText(fMsr2DataParam->runListFileName);
   }
@@ -95,10 +83,12 @@ PMsr2DataDialog::PMsr2DataDialog(PMsr2DataParam *msr2DataParam, const QString he
   fWriteDataHeader_checkBox->setChecked(fMsr2DataParam->writeDbHeader);
   fIgnoreDataHeaderInfo_checkBox->setChecked(fMsr2DataParam->ignoreDataHeaderInfo);
   fKeepMinuit2Output_checkBox->setChecked(fMsr2DataParam->keepMinuit2Output);
+  fEstimateN0_checkBox->setChecked(fMsr2DataParam->estimateN0);
   fWriteColumnData_checkBox->setChecked(fMsr2DataParam->writeColumnData);
   fRecreateDataFile_checkBox->setChecked(fMsr2DataParam->recreateDbFile);
   fChainFit_checkBox->setChecked(fMsr2DataParam->chainFit);
   fOpenFilesAfterFitting_checkBox->setChecked(fMsr2DataParam->openFilesAfterFitting);
+  fWritePerRunBlockChisq_checkBox->setChecked(fMsr2DataParam->perRunBlockChisq);
   fTitleFromData_checkBox->setChecked(fMsr2DataParam->titleFromDataFile);
   fCreateMsrFileOnly_checkBox->setChecked(fMsr2DataParam->createMsrFileOnly);
   fFitOnly_checkBox->setChecked(fMsr2DataParam->fitOnly);
@@ -115,16 +105,6 @@ PMsr2DataDialog::PMsr2DataDialog(PMsr2DataParam *msr2DataParam, const QString he
  */
 PMsr2DataParam* PMsr2DataDialog::getMsr2DataParam()
 {
-  if (fFirst_lineEdit->text().isEmpty()) {
-    fMsr2DataParam->firstRun = -1;
-  } else {
-    fMsr2DataParam->firstRun = fFirst_lineEdit->text().toInt();
-  }
-  if (fLast_lineEdit->text().isEmpty()) {
-    fMsr2DataParam->lastRun  = -1;
-  } else {
-    fMsr2DataParam->lastRun  = fLast_lineEdit->text().toInt();
-  }
   fMsr2DataParam->runList  = fRunList_lineEdit->text();
   fMsr2DataParam->runListFileName = fRunListFileName_lineEdit->text();
   fMsr2DataParam->msrFileExtension = fMsrFileExtension_lineEdit->text();
@@ -138,10 +118,12 @@ PMsr2DataParam* PMsr2DataDialog::getMsr2DataParam()
   fMsr2DataParam->writeDbHeader = fWriteDataHeader_checkBox->isChecked();
   fMsr2DataParam->ignoreDataHeaderInfo = fIgnoreDataHeaderInfo_checkBox->isChecked();
   fMsr2DataParam->keepMinuit2Output = fKeepMinuit2Output_checkBox->isChecked();
+  fMsr2DataParam->estimateN0 = fEstimateN0_checkBox->isChecked();
   fMsr2DataParam->writeColumnData = fWriteColumnData_checkBox->isChecked();
   fMsr2DataParam->recreateDbFile = fRecreateDataFile_checkBox->isChecked();
   fMsr2DataParam->chainFit = fChainFit_checkBox->isChecked();
   fMsr2DataParam->openFilesAfterFitting = fOpenFilesAfterFitting_checkBox->isChecked();
+  fMsr2DataParam->perRunBlockChisq = fWritePerRunBlockChisq_checkBox->isChecked();
   fMsr2DataParam->titleFromDataFile = fTitleFromData_checkBox->isChecked();
   fMsr2DataParam->createMsrFileOnly = fCreateMsrFileOnly_checkBox->isChecked();
   fMsr2DataParam->fitOnly = fFitOnly_checkBox->isChecked();
@@ -151,50 +133,6 @@ PMsr2DataParam* PMsr2DataDialog::getMsr2DataParam()
   return fMsr2DataParam;
 }
 
-//----------------------------------------------------------------------------------------------------
-/**
- * <p>SLOT: called when in the 'Run List Input', the 'First' text field is activated. It clears any
- * entries in 'Run List' and 'Run List File Name'. It furthermore sets the run tag.
- *
- * \param str string content of the QTextEdit field.
- */
-void PMsr2DataDialog::runFirstEntered(const QString &str)
-{
-
-  if (str.length() == 0)
-    return;
-
-  fRunTag = 0;
-
-  if (!fRunList_lineEdit->text().isEmpty())
-    fRunList_lineEdit->clear();
-  if (!fRunListFileName_lineEdit->text().isEmpty())
-    fRunListFileName_lineEdit->clear();
-}
-
-//----------------------------------------------------------------------------------------------------
-/**
- * <p>SLOT: called when in the 'Run List Input', the 'Last' text field is activated. It clears any
- * entries in 'Run List' and 'Run List File Name'. It furthermore sets the run tag.
- *
- * \param str string content of the QTextEdit field.
- */
-void PMsr2DataDialog::runLastEntered(const QString &str)
-{
-  if (str.length() == 0)
-    return;
-
-  fRunTag = 0;
-
-  if (!fRunList_lineEdit->text().isEmpty())
-    fRunList_lineEdit->clear();
-  if (!fRunListFileName_lineEdit->text().isEmpty())
-    fRunListFileName_lineEdit->clear();
-
-  if (fLast_lineEdit->text().length() == 1)
-    fLast_lineEdit->update();
-}
-
 //----------------------------------------------------------------------------------------------------
 /**
  * <p>SLOT: called when in the 'Run List Input', the 'Run List' text field is activated. It clears any
@@ -207,12 +145,8 @@ void PMsr2DataDialog::runListEntered(const QString &str)
   if (str.length() == 0)
     return;
 
-  fRunTag = 1;
+  fRunTag = 0;
 
-  if (!fFirst_lineEdit->text().isEmpty())
-    fFirst_lineEdit->clear();
-  if (!fLast_lineEdit->text().isEmpty())
-    fLast_lineEdit->clear();
   if (!fRunListFileName_lineEdit->text().isEmpty())
     fRunListFileName_lineEdit->clear();
 }
@@ -229,12 +163,8 @@ void PMsr2DataDialog::runListFileNameEntered(const QString &str)
   if (str.length() == 0)
     return;
 
-  fRunTag = 2;
+  fRunTag = 1;
 
-  if (!fFirst_lineEdit->text().isEmpty())
-    fFirst_lineEdit->clear();
-  if (!fLast_lineEdit->text().isEmpty())
-    fLast_lineEdit->clear();
   if (!fRunList_lineEdit->text().isEmpty())
     fRunList_lineEdit->clear();
 }
diff --git a/src/musredit/PMsr2DataDialog.h b/src/musredit/PMsr2DataDialog.h
index 06eeaf11..28099740 100644
--- a/src/musredit/PMsr2DataDialog.h
+++ b/src/musredit/PMsr2DataDialog.h
@@ -51,8 +51,6 @@ class PMsr2DataDialog : public QDialog, private Ui::PMsr2DataDialog
     virtual PMsr2DataParam* getMsr2DataParam();
 
   public slots:
-    void runFirstEntered(const QString&);
-    void runLastEntered(const QString&);
     void runListEntered(const QString&);
     void runListFileNameEntered(const QString&);
     void templateRunEntered(const QString&);
@@ -65,7 +63,7 @@ class PMsr2DataDialog : public QDialog, private Ui::PMsr2DataDialog
     void globalPlusOptionSet(bool checked);
 
   private:
-    int fRunTag; ///< -1 = not valid, 0 = first last, 1 = run list, 2 = run list file name
+    int fRunTag; ///< -1 = not valid, 0 = run list, 1 = run list file name
     PMsr2DataParam *fMsr2DataParam; ///< data structure used to handle the necessary input for msr2data.
     QString fHelpUrl; ///< help url for the Fourier block
 };
diff --git a/src/musredit/PTextEdit.cpp b/src/musredit/PTextEdit.cpp
index 6bf78ca2..c3f972b6 100644
--- a/src/musredit/PTextEdit.cpp
+++ b/src/musredit/PTextEdit.cpp
@@ -1853,6 +1853,8 @@ void PTextEdit::musrMsr2Data()
   // init fMsr2DataParam
   fMsr2DataParam->keepMinuit2Output = fAdmin->getKeepMinuit2OutputFlag();
   fMsr2DataParam->titleFromDataFile = fAdmin->getTitleFromDataFileFlag();
+  fMsr2DataParam->estimateN0 = fAdmin->getEstimateN0Flag();
+  fMsr2DataParam->perRunBlockChisq = fAdmin->getChisqPerRunBlockFlag();
 
   PMsr2DataDialog *dlg = new PMsr2DataDialog(fMsr2DataParam, fAdmin->getHelpUrl("msr2data"));
 
@@ -1874,6 +1876,8 @@ void PTextEdit::musrMsr2Data()
     fMsr2DataParam = dlg->getMsr2DataParam();
     fAdmin->setKeepMinuit2OutputFlag(fMsr2DataParam->keepMinuit2Output);
     fAdmin->setTitleFromDataFileFlag(fMsr2DataParam->titleFromDataFile);
+    fAdmin->setEstimateN0Flag(fMsr2DataParam->estimateN0);
+    fAdmin->setChisqPerRunBlockFlag(fMsr2DataParam->perRunBlockChisq);
 
     // analyze parameters
     switch (dlg->getRunTag()) {
@@ -1883,20 +1887,10 @@ void PTextEdit::musrMsr2Data()
            QMessageBox::Ok, QMessageBox::NoButton);
         return;
         break;
-      case 0:  // first last
-        first = QString("%1").arg(fMsr2DataParam->firstRun);
-        last  = QString("%1").arg(fMsr2DataParam->lastRun);
-        if (first.isEmpty() || last.isEmpty()) {
-          QMessageBox::critical(this, "**ERROR**",
-            "If you choose the first/last option,\nfirst AND last needs to be provided.",
-            QMessageBox::Ok, QMessageBox::NoButton);
-          return;
-        }
-        break;
-      case 1:  // run list
+      case 0:  // run list
         runList = fMsr2DataParam->runList;
         break;
-      case 2:  // run list file name
+      case 1:  // run list file name
         runListFileName = fMsr2DataParam->runListFileName;
         fi.setFile(QFileInfo(*fFilenames.find( currentEditor() )).absolutePath() + "/" + runListFileName);
         if (!fi.exists()) {
@@ -1923,10 +1917,6 @@ void PTextEdit::musrMsr2Data()
     // run list argument
     switch (dlg->getRunTag()) {
       case 0:
-        cmd.append(first);
-        cmd.append(last);
-        break;
-      case 1:
         end = 0;
         while (!runList.section(' ', end, end, QString::SectionSkipEmpty).isEmpty()) {
           end++;
@@ -1947,7 +1937,7 @@ void PTextEdit::musrMsr2Data()
           cmd.append(str);
         }
         break;
-      case 2:
+      case 1:
         cmd.append(runListFileName);
         break;
       default:
@@ -2012,6 +2002,16 @@ void PTextEdit::musrMsr2Data()
       cmd.append("-t");
     }
 
+    // estimate N0 (for single histo and muMinus). Add flag only if a fit is done
+    if (fMsr2DataParam->estimateN0 && (fMsr2DataParam->fitOnly || fMsr2DataParam->templateRunNo != -1)) {
+      cmd.append("-e");
+    }
+
+    // write per-run-block chisq. Add flag only if a fit is done
+    if (fMsr2DataParam->perRunBlockChisq && (fMsr2DataParam->fitOnly || fMsr2DataParam->templateRunNo != -1)) {
+      cmd.append("-p");
+    }
+
     // DB output wished
     if (!fMsr2DataParam->dbOutputFileName.isEmpty()) {
       str = "-o" + fMsr2DataParam->dbOutputFileName;
@@ -2056,19 +2056,7 @@ void PTextEdit::musrMsr2Data()
       if (!fMsr2DataParam->global) { // standard fits
 
         switch(dlg->getRunTag()) {
-          case 0: // first run / last run list
-            if (fMsr2DataParam->firstRun != -1) {
-              for (int i=fMsr2DataParam->firstRun; i<=fMsr2DataParam->lastRun; i++) {
-                if (fMsr2DataParam->msrFileExtension.isEmpty())
-                  fln = QString("%1").arg(i) + ".msr";
-                else
-                  fln = QString("%1").arg(i) + fMsr2DataParam->msrFileExtension + ".msr";
-
-                load(QFileInfo(*fFilenames.find( currentEditor() )).absolutePath() + "/" + fln);
-              }
-            }
-            break;
-          case 1: // run list
+          case 0: // run list
             list = getRunList(runList, ok);
             if (!ok)
              return;
@@ -2082,7 +2070,7 @@ void PTextEdit::musrMsr2Data()
               load(QFileInfo(*fFilenames.find( currentEditor() )).absolutePath() + "/" + fln);
             }
             break;
-          case 2: // run list file
+          case 1: // run list file
             file = new QFile(QFileInfo(*fFilenames.find( currentEditor() )).absolutePath() + "/" + fMsr2DataParam->runListFileName);
             if (!file->open(QIODevice::ReadOnly)) {
               str = QString("Couldn't open run list file %1, sorry.").arg(fMsr2DataParam->runListFileName);
@@ -2118,13 +2106,10 @@ void PTextEdit::musrMsr2Data()
         // get the first run number needed to build the global fit file name
         fln = QString("");
         switch(dlg->getRunTag()) {
-          case 0: // first/last run
-            fln = QString("%1").arg(fMsr2DataParam->firstRun) + QString("+global") + fMsr2DataParam->msrFileExtension + QString(".msr");
-            break;
-          case 1: // run list
+          case 0: // run list
             fln = runList.section(" ", 0, 0, QString::SectionSkipEmpty) + QString("+global") + fMsr2DataParam->msrFileExtension + QString(".msr");
             break;
-          case 2: // run list file name
+          case 1: // run list file name
             file = new QFile(QFileInfo(*fFilenames.find( currentEditor() )).absolutePath() + "/" + fMsr2DataParam->runListFileName);
             if (!file->open(QIODevice::ReadOnly)) {
               str = QString("Couldn't open run list file %1, sorry.").arg(fMsr2DataParam->runListFileName);
diff --git a/src/musredit/forms/PMsr2DataDialog.ui b/src/musredit/forms/PMsr2DataDialog.ui
index fa56570f..0266b846 100644
--- a/src/musredit/forms/PMsr2DataDialog.ui
+++ b/src/musredit/forms/PMsr2DataDialog.ui
@@ -9,8 +9,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>552</width>
-    <height>599</height>
+    <width>584</width>
+    <height>578</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -25,8 +25,8 @@
     <rect>
      <x>0</x>
      <y>0</y>
-     <width>551</width>
-     <height>131</height>
+     <width>581</width>
+     <height>111</height>
     </rect>
    </property>
    <property name="font">
@@ -47,93 +47,13 @@
    <widget class="QWidget" name="layoutWidget">
     <property name="geometry">
      <rect>
-      <x>10</x>
+      <x>11</x>
       <y>30</y>
-      <width>531</width>
-      <height>97</height>
+      <width>561</width>
+      <height>70</height>
      </rect>
     </property>
     <layout class="QVBoxLayout" name="verticalLayout_2">
-     <item>
-      <layout class="QHBoxLayout" name="horizontalLayout_2">
-       <item>
-        <widget class="QLabel" name="fFirst_label">
-         <property name="text">
-          <string>First</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QLineEdit" name="fFirst_lineEdit">
-         <property name="toolTip">
-          <string>start run number</string>
-         </property>
-         <property name="whatsThis">
-          <string>start run number</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <spacer name="horizontalSpacer_2">
-         <property name="orientation">
-          <enum>Qt::Horizontal</enum>
-         </property>
-         <property name="sizeType">
-          <enum>QSizePolicy::Expanding</enum>
-         </property>
-         <property name="sizeHint" stdset="0">
-          <size>
-           <width>40</width>
-           <height>20</height>
-          </size>
-         </property>
-        </spacer>
-       </item>
-       <item>
-        <widget class="QLabel" name="fLast_label">
-         <property name="text">
-          <string>Last</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QLineEdit" name="fLast_lineEdit">
-         <property name="toolTip">
-          <string>end run number</string>
-         </property>
-         <property name="whatsThis">
-          <string>end run number</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <spacer name="horizontalSpacer_3">
-         <property name="orientation">
-          <enum>Qt::Horizontal</enum>
-         </property>
-         <property name="sizeType">
-          <enum>QSizePolicy::Fixed</enum>
-         </property>
-         <property name="sizeHint" stdset="0">
-          <size>
-           <width>200</width>
-           <height>20</height>
-          </size>
-         </property>
-        </spacer>
-       </item>
-       <item>
-        <widget class="QLabel" name="fOrFirstLast_label">
-         <property name="text">
-          <string>&lt;b&gt;OR&lt;/b&gt;</string>
-         </property>
-         <property name="textFormat">
-          <enum>Qt::AutoText</enum>
-         </property>
-        </widget>
-       </item>
-      </layout>
-     </item>
      <item>
       <layout class="QHBoxLayout" name="horizontalLayout_3">
        <item>
@@ -232,8 +152,8 @@ p, li { white-space: pre-wrap; }
    <property name="geometry">
     <rect>
      <x>0</x>
-     <y>130</y>
-     <width>551</width>
+     <y>110</y>
+     <width>581</width>
      <height>71</height>
     </rect>
    </property>
@@ -245,8 +165,8 @@ p, li { white-space: pre-wrap; }
      <rect>
       <x>10</x>
       <y>30</y>
-      <width>531</width>
-      <height>29</height>
+      <width>561</width>
+      <height>31</height>
      </rect>
     </property>
     <layout class="QHBoxLayout" name="horizontalLayout_5">
@@ -262,9 +182,12 @@ p, li { white-space: pre-wrap; }
        <property name="orientation">
         <enum>Qt::Horizontal</enum>
        </property>
+       <property name="sizeType">
+        <enum>QSizePolicy::Fixed</enum>
+       </property>
        <property name="sizeHint" stdset="0">
         <size>
-         <width>40</width>
+         <width>30</width>
          <height>20</height>
         </size>
        </property>
@@ -297,8 +220,8 @@ p, li { white-space: pre-wrap; }
    <property name="geometry">
     <rect>
      <x>0</x>
-     <y>200</y>
-     <width>551</width>
+     <y>180</y>
+     <width>581</width>
      <height>80</height>
     </rect>
    </property>
@@ -311,7 +234,7 @@ p, li { white-space: pre-wrap; }
       <x>10</x>
       <y>30</y>
       <width>531</width>
-      <height>29</height>
+      <height>31</height>
      </rect>
     </property>
     <layout class="QHBoxLayout" name="horizontalLayout_6">
@@ -364,8 +287,8 @@ p, li { white-space: pre-wrap; }
    <property name="geometry">
     <rect>
      <x>0</x>
-     <y>280</y>
-     <width>551</width>
+     <y>260</y>
+     <width>581</width>
      <height>80</height>
     </rect>
    </property>
@@ -378,7 +301,7 @@ p, li { white-space: pre-wrap; }
       <x>10</x>
       <y>30</y>
       <width>531</width>
-      <height>29</height>
+      <height>31</height>
      </rect>
     </property>
     <layout class="QHBoxLayout" name="horizontalLayout_7">
@@ -419,8 +342,8 @@ p, li { white-space: pre-wrap; }
    <property name="geometry">
     <rect>
      <x>0</x>
-     <y>360</y>
-     <width>551</width>
+     <y>340</y>
+     <width>581</width>
      <height>172</height>
     </rect>
    </property>
@@ -432,7 +355,7 @@ p, li { white-space: pre-wrap; }
      <rect>
       <x>6</x>
       <y>20</y>
-      <width>541</width>
+      <width>571</width>
       <height>116</height>
      </rect>
     </property>
@@ -473,6 +396,13 @@ p, li { white-space: pre-wrap; }
          </property>
         </widget>
        </item>
+       <item>
+        <widget class="QCheckBox" name="fEstimateN0_checkBox">
+         <property name="text">
+          <string>Estimate N0</string>
+         </property>
+        </widget>
+       </item>
       </layout>
      </item>
      <item>
@@ -517,6 +447,13 @@ p, li { white-space: pre-wrap; }
          </property>
         </widget>
        </item>
+       <item>
+        <widget class="QCheckBox" name="fWritePerRunBlockChisq_checkBox">
+         <property name="text">
+          <string>Write per-run-block Chisq</string>
+         </property>
+        </widget>
+       </item>
       </layout>
      </item>
      <item>
@@ -601,21 +538,24 @@ p, li { white-space: pre-wrap; }
      <rect>
       <x>170</x>
       <y>140</y>
-      <width>371</width>
+      <width>401</width>
       <height>23</height>
      </rect>
     </property>
     <property name="whatsThis">
      <string>parameter numbers to be exported, e.g. 1-16, or 1 3-7, etc.</string>
     </property>
+    <property name="frame">
+     <bool>true</bool>
+    </property>
    </widget>
   </widget>
   <widget class="QWidget" name="layoutWidget">
    <property name="geometry">
     <rect>
      <x>5</x>
-     <y>540</y>
-     <width>541</width>
+     <y>520</y>
+     <width>571</width>
      <height>51</height>
     </rect>
    </property>
@@ -669,8 +609,6 @@ p, li { white-space: pre-wrap; }
   </widget>
  </widget>
  <tabstops>
-  <tabstop>fFirst_lineEdit</tabstop>
-  <tabstop>fLast_lineEdit</tabstop>
   <tabstop>fRunList_lineEdit</tabstop>
   <tabstop>fRunListFileName_lineEdit</tabstop>
   <tabstop>fMsrFileExtension_lineEdit</tabstop>
@@ -744,38 +682,6 @@ p, li { white-space: pre-wrap; }
     </hint>
    </hints>
   </connection>
-  <connection>
-   <sender>fFirst_lineEdit</sender>
-   <signal>textChanged(QString)</signal>
-   <receiver>PMsr2DataDialog</receiver>
-   <slot>runFirstEntered(QString)</slot>
-   <hints>
-    <hint type="sourcelabel">
-     <x>82</x>
-     <y>44</y>
-    </hint>
-    <hint type="destinationlabel">
-     <x>113</x>
-     <y>504</y>
-    </hint>
-   </hints>
-  </connection>
-  <connection>
-   <sender>fLast_lineEdit</sender>
-   <signal>textChanged(QString)</signal>
-   <receiver>PMsr2DataDialog</receiver>
-   <slot>runLastEntered(QString)</slot>
-   <hints>
-    <hint type="sourcelabel">
-     <x>229</x>
-     <y>44</y>
-    </hint>
-    <hint type="destinationlabel">
-     <x>348</x>
-     <y>500</y>
-    </hint>
-   </hints>
-  </connection>
   <connection>
    <sender>fRunList_lineEdit</sender>
    <signal>textChanged(QString)</signal>
diff --git a/src/musredit/musredit.h b/src/musredit/musredit.h
index ffc06cd5..680b8e3c 100644
--- a/src/musredit/musredit.h
+++ b/src/musredit/musredit.h
@@ -41,8 +41,6 @@
  * parameters see <code>msr2data --help</code> and the online documentation.
  */
 typedef struct {
-  int firstRun;                ///< first run number of a sequence of runs (usage 2 of msr2data)
-  int lastRun;                 ///< last run number of a sequence of runs (usage 2 of msr2data)
   QString runList;             ///< list of run numbers (usage 3 of msr2data)
   QString runListFileName;     ///< run list filename (usage 4 of msr2data)
   QString msrFileExtension;    ///< msr filename extension, e.g. '0100_h13.msr' -> '_h13'
@@ -57,6 +55,8 @@ typedef struct {
   bool chainFit;               ///< flag: true = chain fit, i.e. the template for a fit is the preceeding run. false = the template is always the source for the new msr-file
   bool openFilesAfterFitting;  ///< flag: true = open msr-file after fit in musredit. false = do not open msr-file after fit.
   bool titleFromDataFile;      ///< flag indicating if the title for the msr-file shall be extracted from the data-file ('-t' in msr2data)
+  bool estimateN0;             ///< flag indicating if the N0 shall be estimated for single histogram fitting
+  bool perRunBlockChisq;       ///< flag indicating if per-run-block-chisq shall be dumped into the msr-file
   bool createMsrFileOnly;      ///< flag: true = just create the msr-files without any fitting ('msr-<template>' in msr2data)
   bool fitOnly;                ///< flag: true = just perform the fits wihtout generating any msr-files ('fit' in msr2data).
   bool global;                 ///< flag: true = 'global' option
diff --git a/src/musredit_qt5/PAdmin.cpp b/src/musredit_qt5/PAdmin.cpp
index 4a1f2fa1..340edef1 100644
--- a/src/musredit_qt5/PAdmin.cpp
+++ b/src/musredit_qt5/PAdmin.cpp
@@ -296,6 +296,7 @@ bool PAdminXMLParser::characters(const QString& str)
         flag = true;
       else
         flag = false;
+      fAdmin->fMsr2DataParam.estimateN0 = flag;
       fAdmin->setEstimateN0Flag(flag);
       break;
     case eChisqPreRunBlock:
@@ -303,6 +304,7 @@ bool PAdminXMLParser::characters(const QString& str)
         flag = true;
       else
         flag = false;
+      fAdmin->fMsr2DataParam.perRunBlockChisq = flag;
       fAdmin->setChisqPerRunBlockFlag(flag);
       break;
     case eRecentFile:
@@ -641,8 +643,6 @@ PAdmin::PAdmin() : QObject()
   fEstimateN0         = true;
   fChisqPreRunBlock   = false;
 
-  fMsr2DataParam.firstRun = -1;
-  fMsr2DataParam.lastRun  = -1;
   fMsr2DataParam.runList  = QString("");
   fMsr2DataParam.runListFileName = QString("");
   fMsr2DataParam.msrFileExtension = QString("");
@@ -651,10 +651,12 @@ PAdmin::PAdmin() : QObject()
   fMsr2DataParam.writeDbHeader = true;
   fMsr2DataParam.ignoreDataHeaderInfo = false;
   fMsr2DataParam.keepMinuit2Output = false;
+  fMsr2DataParam.estimateN0 = fEstimateN0;
   fMsr2DataParam.writeColumnData = false;
   fMsr2DataParam.recreateDbFile = false;
   fMsr2DataParam.chainFit = true;
   fMsr2DataParam.openFilesAfterFitting = true;
+  fMsr2DataParam.perRunBlockChisq = fChisqPreRunBlock;
   fMsr2DataParam.titleFromDataFile = true;
   fMsr2DataParam.createMsrFileOnly = false;
   fMsr2DataParam.fitOnly = false;
diff --git a/src/musredit_qt5/PMsr2DataDialog.cpp b/src/musredit_qt5/PMsr2DataDialog.cpp
index 2a2b2f4e..6a1c66fc 100644
--- a/src/musredit_qt5/PMsr2DataDialog.cpp
+++ b/src/musredit_qt5/PMsr2DataDialog.cpp
@@ -54,18 +54,6 @@ PMsr2DataDialog::PMsr2DataDialog(PMsr2DataParam *msr2DataParam, const QString he
 
   fRunTag = -1;
 
-  fFirst_lineEdit->setValidator( new QIntValidator(fFirst_lineEdit) );
-  if (fMsr2DataParam->firstRun != -1) {
-    str = QString("%1").arg(fMsr2DataParam->firstRun);
-    fFirst_lineEdit->setText(str);
-  }
-
-  fLast_lineEdit->setValidator( new QIntValidator(fLast_lineEdit) );
-  if (fMsr2DataParam->lastRun != -1) {
-    str = QString("%1").arg(fMsr2DataParam->lastRun);
-    fLast_lineEdit->setText(str);
-  }
-
   if (!fMsr2DataParam->runListFileName.isEmpty()) {
     fRunListFileName_lineEdit->setText(fMsr2DataParam->runListFileName);
   }
@@ -95,10 +83,12 @@ PMsr2DataDialog::PMsr2DataDialog(PMsr2DataParam *msr2DataParam, const QString he
   fWriteDataHeader_checkBox->setChecked(fMsr2DataParam->writeDbHeader);
   fIgnoreDataHeaderInfo_checkBox->setChecked(fMsr2DataParam->ignoreDataHeaderInfo);
   fKeepMinuit2Output_checkBox->setChecked(fMsr2DataParam->keepMinuit2Output);
+  fEstimateN0_checkBox->setChecked(fMsr2DataParam->estimateN0);
   fWriteColumnData_checkBox->setChecked(fMsr2DataParam->writeColumnData);
   fRecreateDataFile_checkBox->setChecked(fMsr2DataParam->recreateDbFile);
   fChainFit_checkBox->setChecked(fMsr2DataParam->chainFit);
   fOpenFilesAfterFitting_checkBox->setChecked(fMsr2DataParam->openFilesAfterFitting);
+  fWritePerRunBlockChisq_checkBox->setChecked(fMsr2DataParam->perRunBlockChisq);
   fTitleFromData_checkBox->setChecked(fMsr2DataParam->titleFromDataFile);
   fCreateMsrFileOnly_checkBox->setChecked(fMsr2DataParam->createMsrFileOnly);
   fFitOnly_checkBox->setChecked(fMsr2DataParam->fitOnly);
@@ -117,16 +107,6 @@ PMsr2DataDialog::PMsr2DataDialog(PMsr2DataParam *msr2DataParam, const QString he
  */
 PMsr2DataParam* PMsr2DataDialog::getMsr2DataParam()
 {
-  if (fFirst_lineEdit->text().isEmpty()) {
-    fMsr2DataParam->firstRun = -1;
-  } else {
-    fMsr2DataParam->firstRun = fFirst_lineEdit->text().toInt();
-  }
-  if (fLast_lineEdit->text().isEmpty()) {
-    fMsr2DataParam->lastRun  = -1;
-  } else {
-    fMsr2DataParam->lastRun  = fLast_lineEdit->text().toInt();
-  }
   fMsr2DataParam->runList  = fRunList_lineEdit->text();
   fMsr2DataParam->runListFileName = fRunListFileName_lineEdit->text();
   fMsr2DataParam->msrFileExtension = fMsrFileExtension_lineEdit->text();
@@ -140,10 +120,12 @@ PMsr2DataParam* PMsr2DataDialog::getMsr2DataParam()
   fMsr2DataParam->writeDbHeader = fWriteDataHeader_checkBox->isChecked();
   fMsr2DataParam->ignoreDataHeaderInfo = fIgnoreDataHeaderInfo_checkBox->isChecked();
   fMsr2DataParam->keepMinuit2Output = fKeepMinuit2Output_checkBox->isChecked();
+  fMsr2DataParam->estimateN0 = fEstimateN0_checkBox->isChecked();
   fMsr2DataParam->writeColumnData = fWriteColumnData_checkBox->isChecked();
   fMsr2DataParam->recreateDbFile = fRecreateDataFile_checkBox->isChecked();
   fMsr2DataParam->chainFit = fChainFit_checkBox->isChecked();
   fMsr2DataParam->openFilesAfterFitting = fOpenFilesAfterFitting_checkBox->isChecked();
+  fMsr2DataParam->perRunBlockChisq = fWritePerRunBlockChisq_checkBox->isChecked();
   fMsr2DataParam->titleFromDataFile = fTitleFromData_checkBox->isChecked();
   fMsr2DataParam->createMsrFileOnly = fCreateMsrFileOnly_checkBox->isChecked();
   fMsr2DataParam->fitOnly = fFitOnly_checkBox->isChecked();
@@ -153,50 +135,6 @@ PMsr2DataParam* PMsr2DataDialog::getMsr2DataParam()
   return fMsr2DataParam;
 }
 
-//----------------------------------------------------------------------------------------------------
-/**
- * <p>SLOT: called when in the 'Run List Input', the 'First' text field is activated. It clears any
- * entries in 'Run List' and 'Run List File Name'. It furthermore sets the run tag.
- *
- * \param str string content of the QTextEdit field.
- */
-void PMsr2DataDialog::runFirstEntered(const QString &str)
-{
-
-  if (str.length() == 0)
-    return;
-
-  fRunTag = 0;
-
-  if (!fRunList_lineEdit->text().isEmpty())
-    fRunList_lineEdit->clear();
-  if (!fRunListFileName_lineEdit->text().isEmpty())
-    fRunListFileName_lineEdit->clear();
-}
-
-//----------------------------------------------------------------------------------------------------
-/**
- * <p>SLOT: called when in the 'Run List Input', the 'Last' text field is activated. It clears any
- * entries in 'Run List' and 'Run List File Name'. It furthermore sets the run tag.
- *
- * \param str string content of the QTextEdit field.
- */
-void PMsr2DataDialog::runLastEntered(const QString &str)
-{
-  if (str.length() == 0)
-    return;
-
-  fRunTag = 0;
-
-  if (!fRunList_lineEdit->text().isEmpty())
-    fRunList_lineEdit->clear();
-  if (!fRunListFileName_lineEdit->text().isEmpty())
-    fRunListFileName_lineEdit->clear();
-
-  if (fLast_lineEdit->text().length() == 1)
-    fLast_lineEdit->update();
-}
-
 //----------------------------------------------------------------------------------------------------
 /**
  * <p>SLOT: called when in the 'Run List Input', the 'Run List' text field is activated. It clears any
@@ -209,12 +147,8 @@ void PMsr2DataDialog::runListEntered(const QString &str)
   if (str.length() == 0)
     return;
 
-  fRunTag = 1;
+  fRunTag = 0;
 
-  if (!fFirst_lineEdit->text().isEmpty())
-    fFirst_lineEdit->clear();
-  if (!fLast_lineEdit->text().isEmpty())
-    fLast_lineEdit->clear();
   if (!fRunListFileName_lineEdit->text().isEmpty())
     fRunListFileName_lineEdit->clear();
 }
@@ -231,12 +165,8 @@ void PMsr2DataDialog::runListFileNameEntered(const QString &str)
   if (str.length() == 0)
     return;
 
-  fRunTag = 2;
+  fRunTag = 1;
 
-  if (!fFirst_lineEdit->text().isEmpty())
-    fFirst_lineEdit->clear();
-  if (!fLast_lineEdit->text().isEmpty())
-    fLast_lineEdit->clear();
   if (!fRunList_lineEdit->text().isEmpty())
     fRunList_lineEdit->clear();
 }
diff --git a/src/musredit_qt5/PMsr2DataDialog.h b/src/musredit_qt5/PMsr2DataDialog.h
index 06eeaf11..28099740 100644
--- a/src/musredit_qt5/PMsr2DataDialog.h
+++ b/src/musredit_qt5/PMsr2DataDialog.h
@@ -51,8 +51,6 @@ class PMsr2DataDialog : public QDialog, private Ui::PMsr2DataDialog
     virtual PMsr2DataParam* getMsr2DataParam();
 
   public slots:
-    void runFirstEntered(const QString&);
-    void runLastEntered(const QString&);
     void runListEntered(const QString&);
     void runListFileNameEntered(const QString&);
     void templateRunEntered(const QString&);
@@ -65,7 +63,7 @@ class PMsr2DataDialog : public QDialog, private Ui::PMsr2DataDialog
     void globalPlusOptionSet(bool checked);
 
   private:
-    int fRunTag; ///< -1 = not valid, 0 = first last, 1 = run list, 2 = run list file name
+    int fRunTag; ///< -1 = not valid, 0 = run list, 1 = run list file name
     PMsr2DataParam *fMsr2DataParam; ///< data structure used to handle the necessary input for msr2data.
     QString fHelpUrl; ///< help url for the Fourier block
 };
diff --git a/src/musredit_qt5/PTextEdit.cpp b/src/musredit_qt5/PTextEdit.cpp
index 57df7388..e5e352e5 100644
--- a/src/musredit_qt5/PTextEdit.cpp
+++ b/src/musredit_qt5/PTextEdit.cpp
@@ -1866,6 +1866,8 @@ void PTextEdit::musrMsr2Data()
   // init fMsr2DataParam
   fMsr2DataParam->keepMinuit2Output = fAdmin->getKeepMinuit2OutputFlag();
   fMsr2DataParam->titleFromDataFile = fAdmin->getTitleFromDataFileFlag();
+  fMsr2DataParam->estimateN0 = fAdmin->getEstimateN0Flag();
+  fMsr2DataParam->perRunBlockChisq = fAdmin->getChisqPerRunBlockFlag();
 
   PMsr2DataDialog *dlg = new PMsr2DataDialog(fMsr2DataParam, fAdmin->getHelpUrl("msr2data"));
 
@@ -1887,6 +1889,8 @@ void PTextEdit::musrMsr2Data()
     fMsr2DataParam = dlg->getMsr2DataParam();
     fAdmin->setKeepMinuit2OutputFlag(fMsr2DataParam->keepMinuit2Output);
     fAdmin->setTitleFromDataFileFlag(fMsr2DataParam->titleFromDataFile);
+    fAdmin->setEstimateN0Flag(fMsr2DataParam->estimateN0);
+    fAdmin->setChisqPerRunBlockFlag(fMsr2DataParam->perRunBlockChisq);
 
     // analyze parameters
     switch (dlg->getRunTag()) {
@@ -1896,20 +1900,10 @@ void PTextEdit::musrMsr2Data()
            QMessageBox::Ok, QMessageBox::NoButton);
         return;
         break;
-      case 0:  // first last
-        first = QString("%1").arg(fMsr2DataParam->firstRun);
-        last  = QString("%1").arg(fMsr2DataParam->lastRun);
-        if (first.isEmpty() || last.isEmpty()) {
-          QMessageBox::critical(this, "**ERROR**",
-            "If you choose the first/last option,\nfirst AND last needs to be provided.",
-            QMessageBox::Ok, QMessageBox::NoButton);
-          return;
-        }
-        break;
-      case 1:  // run list
+      case 0:  // run list
         runList = fMsr2DataParam->runList;
         break;
-      case 2:  // run list file name
+      case 1:  // run list file name
         runListFileName = fMsr2DataParam->runListFileName;
         fi.setFile(QFileInfo(*fFilenames.find( currentEditor() )).absolutePath() + "/" + runListFileName);
         if (!fi.exists()) {
@@ -1936,10 +1930,6 @@ void PTextEdit::musrMsr2Data()
     // run list argument
     switch (dlg->getRunTag()) {
       case 0:
-        cmd.append(first);
-        cmd.append(last);
-        break;
-      case 1:
         end = 0;
         while (!runList.section(' ', end, end, QString::SectionSkipEmpty).isEmpty()) {
           end++;
@@ -1960,7 +1950,7 @@ void PTextEdit::musrMsr2Data()
           cmd.append(str);
         }
         break;
-      case 2:
+      case 1:
         cmd.append(runListFileName);
         break;
       default:
@@ -2025,6 +2015,16 @@ void PTextEdit::musrMsr2Data()
       cmd.append("-t");
     }
 
+    // estimate N0 (makes sence for single histo and muMinus fits only). Add flag only if a fit is done
+    if (fMsr2DataParam->estimateN0 && (fMsr2DataParam->fitOnly || fMsr2DataParam->templateRunNo != -1)) {
+      cmd.append("-e");
+    }
+
+    // write per-run-block chisq. Add flag only if a fit is done
+    if (fMsr2DataParam->perRunBlockChisq && (fMsr2DataParam->fitOnly || fMsr2DataParam->templateRunNo != -1)) {
+      cmd.append("-p");
+    }
+
     // DB output wished
     if (!fMsr2DataParam->dbOutputFileName.isEmpty()) {
       str = "-o" + fMsr2DataParam->dbOutputFileName;
@@ -2068,19 +2068,7 @@ void PTextEdit::musrMsr2Data()
 
       if (!fMsr2DataParam->global) { // standard fits
         switch(dlg->getRunTag()) {
-          case 0: // first run / last run list
-            if (fMsr2DataParam->firstRun != -1) {
-              for (int i=fMsr2DataParam->firstRun; i<=fMsr2DataParam->lastRun; i++) {
-                if (fMsr2DataParam->msrFileExtension.isEmpty())
-                  fln = QString("%1").arg(i) + ".msr";
-                else
-                  fln = QString("%1").arg(i) + fMsr2DataParam->msrFileExtension + ".msr";
-
-                load(QFileInfo(*fFilenames.find( currentEditor() )).absolutePath() + "/" + fln);
-              }
-            }
-            break;
-          case 1: // run list
+          case 0: // run list
             list = getRunList(runList, ok);
             if (!ok)
               return;
@@ -2094,7 +2082,7 @@ void PTextEdit::musrMsr2Data()
               load(QFileInfo(*fFilenames.find( currentEditor() )).absolutePath() + "/" + fln);
             }
             break;
-          case 2: // run list file
+          case 1: // run list file
             file = new QFile(QFileInfo(*fFilenames.find( currentEditor() )).absolutePath() + "/" + fMsr2DataParam->runListFileName);
             if (!file->open(QIODevice::ReadOnly)) {
               str = QString("Couldn't open run list file %1, sorry.").arg(fMsr2DataParam->runListFileName);
@@ -2130,13 +2118,10 @@ void PTextEdit::musrMsr2Data()
         // get the first run number needed to build the global fit file name
         fln = QString("");
         switch(dlg->getRunTag()) {
-          case 0: // first/last run
-            fln = QString("%1").arg(fMsr2DataParam->firstRun) + QString("+global") + fMsr2DataParam->msrFileExtension + QString(".msr");
-            break;
-          case 1: // run list
+          case 0: // run list
             fln = runList.section(" ", 0, 0, QString::SectionSkipEmpty) + QString("+global") + fMsr2DataParam->msrFileExtension + QString(".msr");
             break;
-          case 2: // run list file name
+          case 1: // run list file name
             file = new QFile(QFileInfo(*fFilenames.find( currentEditor() )).absolutePath() + "/" + fMsr2DataParam->runListFileName);
             if (!file->open(QIODevice::ReadOnly)) {
               str = QString("Couldn't open run list file %1, sorry.").arg(fMsr2DataParam->runListFileName);
diff --git a/src/musredit_qt5/forms/PMsr2DataDialog.ui b/src/musredit_qt5/forms/PMsr2DataDialog.ui
index 4c5c2703..1685008c 100644
--- a/src/musredit_qt5/forms/PMsr2DataDialog.ui
+++ b/src/musredit_qt5/forms/PMsr2DataDialog.ui
@@ -9,7 +9,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>552</width>
+    <width>585</width>
     <height>594</height>
    </rect>
   </property>
@@ -25,8 +25,8 @@
     <rect>
      <x>0</x>
      <y>0</y>
-     <width>551</width>
-     <height>131</height>
+     <width>581</width>
+     <height>111</height>
     </rect>
    </property>
    <property name="font">
@@ -44,96 +44,16 @@
    <property name="checkable">
     <bool>false</bool>
    </property>
-   <widget class="QWidget" name="layoutWidget">
+   <widget class="QWidget" name="">
     <property name="geometry">
      <rect>
       <x>10</x>
       <y>30</y>
-      <width>531</width>
-      <height>97</height>
+      <width>561</width>
+      <height>70</height>
      </rect>
     </property>
     <layout class="QVBoxLayout" name="verticalLayout_2">
-     <item>
-      <layout class="QHBoxLayout" name="horizontalLayout_2">
-       <item>
-        <widget class="QLabel" name="fFirst_label">
-         <property name="text">
-          <string>First</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QLineEdit" name="fFirst_lineEdit">
-         <property name="toolTip">
-          <string>start run number</string>
-         </property>
-         <property name="whatsThis">
-          <string>start run number</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <spacer name="horizontalSpacer_2">
-         <property name="orientation">
-          <enum>Qt::Horizontal</enum>
-         </property>
-         <property name="sizeType">
-          <enum>QSizePolicy::Expanding</enum>
-         </property>
-         <property name="sizeHint" stdset="0">
-          <size>
-           <width>40</width>
-           <height>20</height>
-          </size>
-         </property>
-        </spacer>
-       </item>
-       <item>
-        <widget class="QLabel" name="fLast_label">
-         <property name="text">
-          <string>Last</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <widget class="QLineEdit" name="fLast_lineEdit">
-         <property name="toolTip">
-          <string>end run number</string>
-         </property>
-         <property name="statusTip">
-          <string>end run number</string>
-         </property>
-        </widget>
-       </item>
-       <item>
-        <spacer name="horizontalSpacer_3">
-         <property name="orientation">
-          <enum>Qt::Horizontal</enum>
-         </property>
-         <property name="sizeType">
-          <enum>QSizePolicy::Fixed</enum>
-         </property>
-         <property name="sizeHint" stdset="0">
-          <size>
-           <width>200</width>
-           <height>20</height>
-          </size>
-         </property>
-        </spacer>
-       </item>
-       <item>
-        <widget class="QLabel" name="fOrFirstLast_label">
-         <property name="text">
-          <string>&lt;b&gt;OR&lt;/b&gt;</string>
-         </property>
-         <property name="textFormat">
-          <enum>Qt::AutoText</enum>
-         </property>
-        </widget>
-       </item>
-      </layout>
-     </item>
      <item>
       <layout class="QHBoxLayout" name="horizontalLayout_3">
        <item>
@@ -219,8 +139,8 @@
    <property name="geometry">
     <rect>
      <x>0</x>
-     <y>130</y>
-     <width>551</width>
+     <y>110</y>
+     <width>581</width>
      <height>71</height>
     </rect>
    </property>
@@ -232,8 +152,8 @@
      <rect>
       <x>10</x>
       <y>30</y>
-      <width>531</width>
-      <height>29</height>
+      <width>561</width>
+      <height>31</height>
      </rect>
     </property>
     <layout class="QHBoxLayout" name="horizontalLayout_5">
@@ -249,9 +169,12 @@
        <property name="orientation">
         <enum>Qt::Horizontal</enum>
        </property>
+       <property name="sizeType">
+        <enum>QSizePolicy::Fixed</enum>
+       </property>
        <property name="sizeHint" stdset="0">
         <size>
-         <width>40</width>
+         <width>30</width>
          <height>20</height>
         </size>
        </property>
@@ -284,8 +207,8 @@
    <property name="geometry">
     <rect>
      <x>0</x>
-     <y>200</y>
-     <width>551</width>
+     <y>180</y>
+     <width>581</width>
      <height>80</height>
     </rect>
    </property>
@@ -297,8 +220,8 @@
      <rect>
       <x>10</x>
       <y>30</y>
-      <width>531</width>
-      <height>29</height>
+      <width>561</width>
+      <height>31</height>
      </rect>
     </property>
     <layout class="QHBoxLayout" name="horizontalLayout_6">
@@ -346,8 +269,8 @@
    <property name="geometry">
     <rect>
      <x>0</x>
-     <y>280</y>
-     <width>551</width>
+     <y>260</y>
+     <width>581</width>
      <height>80</height>
     </rect>
    </property>
@@ -359,8 +282,8 @@
      <rect>
       <x>10</x>
       <y>30</y>
-      <width>531</width>
-      <height>29</height>
+      <width>561</width>
+      <height>31</height>
      </rect>
     </property>
     <layout class="QHBoxLayout" name="horizontalLayout_7">
@@ -401,9 +324,9 @@
    <property name="geometry">
     <rect>
      <x>0</x>
-     <y>360</y>
-     <width>551</width>
-     <height>171</height>
+     <y>340</y>
+     <width>581</width>
+     <height>191</height>
     </rect>
    </property>
    <property name="title">
@@ -414,8 +337,8 @@
      <rect>
       <x>6</x>
       <y>20</y>
-      <width>541</width>
-      <height>116</height>
+      <width>560</width>
+      <height>131</height>
      </rect>
     </property>
     <layout class="QHBoxLayout" name="horizontalLayout_9">
@@ -451,6 +374,13 @@
          </property>
         </widget>
        </item>
+       <item>
+        <widget class="QCheckBox" name="fEstimateN0_checkBox">
+         <property name="text">
+          <string>Estimate N0</string>
+         </property>
+        </widget>
+       </item>
       </layout>
      </item>
      <item>
@@ -485,6 +415,13 @@
          </property>
         </widget>
        </item>
+       <item>
+        <widget class="QCheckBox" name="fWritePerRunBlockChisq_checkBox">
+         <property name="text">
+          <string>Write per-run-block Chisq</string>
+         </property>
+        </widget>
+       </item>
       </layout>
      </item>
      <item>
@@ -551,7 +488,7 @@
     <property name="geometry">
      <rect>
       <x>9</x>
-      <y>143</y>
+      <y>160</y>
       <width>141</width>
       <height>16</height>
      </rect>
@@ -566,9 +503,9 @@
    <widget class="QLineEdit" name="fParamList_lineEdit">
     <property name="geometry">
      <rect>
-      <x>150</x>
-      <y>140</y>
-      <width>395</width>
+      <x>164</x>
+      <y>157</y>
+      <width>401</width>
       <height>23</height>
      </rect>
     </property>
@@ -582,7 +519,7 @@
     <rect>
      <x>5</x>
      <y>540</y>
-     <width>541</width>
+     <width>571</width>
      <height>51</height>
     </rect>
    </property>
@@ -636,8 +573,6 @@
   </widget>
  </widget>
  <tabstops>
-  <tabstop>fFirst_lineEdit</tabstop>
-  <tabstop>fLast_lineEdit</tabstop>
   <tabstop>fRunList_lineEdit</tabstop>
   <tabstop>fRunListFileName_lineEdit</tabstop>
   <tabstop>fMsrFileExtension_lineEdit</tabstop>
@@ -712,38 +647,6 @@
     </hint>
    </hints>
   </connection>
-  <connection>
-   <sender>fFirst_lineEdit</sender>
-   <signal>textChanged(QString)</signal>
-   <receiver>PMsr2DataDialog</receiver>
-   <slot>runFirstEntered(QString)</slot>
-   <hints>
-    <hint type="sourcelabel">
-     <x>82</x>
-     <y>44</y>
-    </hint>
-    <hint type="destinationlabel">
-     <x>113</x>
-     <y>504</y>
-    </hint>
-   </hints>
-  </connection>
-  <connection>
-   <sender>fLast_lineEdit</sender>
-   <signal>textChanged(QString)</signal>
-   <receiver>PMsr2DataDialog</receiver>
-   <slot>runLastEntered(QString)</slot>
-   <hints>
-    <hint type="sourcelabel">
-     <x>229</x>
-     <y>44</y>
-    </hint>
-    <hint type="destinationlabel">
-     <x>348</x>
-     <y>500</y>
-    </hint>
-   </hints>
-  </connection>
   <connection>
    <sender>fRunList_lineEdit</sender>
    <signal>textChanged(QString)</signal>
diff --git a/src/musredit_qt5/musredit.h b/src/musredit_qt5/musredit.h
index ffc06cd5..680b8e3c 100644
--- a/src/musredit_qt5/musredit.h
+++ b/src/musredit_qt5/musredit.h
@@ -41,8 +41,6 @@
  * parameters see <code>msr2data --help</code> and the online documentation.
  */
 typedef struct {
-  int firstRun;                ///< first run number of a sequence of runs (usage 2 of msr2data)
-  int lastRun;                 ///< last run number of a sequence of runs (usage 2 of msr2data)
   QString runList;             ///< list of run numbers (usage 3 of msr2data)
   QString runListFileName;     ///< run list filename (usage 4 of msr2data)
   QString msrFileExtension;    ///< msr filename extension, e.g. '0100_h13.msr' -> '_h13'
@@ -57,6 +55,8 @@ typedef struct {
   bool chainFit;               ///< flag: true = chain fit, i.e. the template for a fit is the preceeding run. false = the template is always the source for the new msr-file
   bool openFilesAfterFitting;  ///< flag: true = open msr-file after fit in musredit. false = do not open msr-file after fit.
   bool titleFromDataFile;      ///< flag indicating if the title for the msr-file shall be extracted from the data-file ('-t' in msr2data)
+  bool estimateN0;             ///< flag indicating if the N0 shall be estimated for single histogram fitting
+  bool perRunBlockChisq;       ///< flag indicating if per-run-block-chisq shall be dumped into the msr-file
   bool createMsrFileOnly;      ///< flag: true = just create the msr-files without any fitting ('msr-<template>' in msr2data)
   bool fitOnly;                ///< flag: true = just perform the fits wihtout generating any msr-files ('fit' in msr2data).
   bool global;                 ///< flag: true = 'global' option