diff --git a/src/classes/PRunAsymmetry.cpp b/src/classes/PRunAsymmetry.cpp
index c19ed6c5..8ffe3fdb 100644
--- a/src/classes/PRunAsymmetry.cpp
+++ b/src/classes/PRunAsymmetry.cpp
@@ -81,10 +81,12 @@ PRunAsymmetry::PRunAsymmetry() : PRunBase()
 PRunAsymmetry::PRunAsymmetry(PMsrHandler *msrInfo, PRunDataHandler *rawData, UInt_t runNo, EPMusrHandleTag tag, Bool_t theoAsData) :
   PRunBase(msrInfo, rawData, runNo, tag), fTheoAsData(theoAsData)
 {
-  // the 2 following variables are need in case fit range is given in bins, and since
+  // the following variables are need in case fit range is given in bins, and since
   // the fit range can be changed in the command block, these variables need to be accessible
   fGoodBins[0] = -1;
   fGoodBins[1] = -1;
+  fGoodBins[2] = -1;
+  fGoodBins[3] = -1;
 
   fStartTimeBin = -1;
   fEndTimeBin   = -1;
@@ -853,7 +855,7 @@ Bool_t PRunAsymmetry::SubtractEstimatedBkg()
   Int_t end[2]   = {fRunInfo->GetBkgRange(1), fRunInfo->GetBkgRange(3)};
   for (UInt_t i=0; i<2; i++) {
     if (end[i] < start[i]) {
-      std::cout << std::endl << "PRunAsymmetry::SubtractEstimatedBkg(): end = " << end[i] << " > start = " << start[i] << "! Will swap them!";
+      std::cout << std::endl << ">> PRunAsymmetry::SubtractEstimatedBkg(): end = " << end[i] << " > start = " << start[i] << "! Will swap them!";
       UInt_t keep = end[i];
       end[i] = start[i];
       start[i] = keep;
@@ -867,7 +869,7 @@ Bool_t PRunAsymmetry::SubtractEstimatedBkg()
       UInt_t fullCycles = static_cast<UInt_t>(timeBkg/beamPeriod); // how many proton beam cylces can be placed within the proposed background intervall
       // correct the end of the background intervall such that the background is as close as possible to a multiple of the proton cylce
       end[i] = start[i] + static_cast<UInt_t>((fullCycles*beamPeriod)/(fTimeResolution*fPacking));
-      std::cout << "PRunAsymmetry::SubtractEstimatedBkg(): Background " << start[i] << ", " << end[i] << std::endl;
+      std::cout << ">> PRunAsymmetry::SubtractEstimatedBkg(): Background " << start[i] << ", " << end[i] << std::endl;
       if (end[i] == start[i])
         end[i] = fRunInfo->GetBkgRange(2*i+1);
     }
@@ -1975,6 +1977,22 @@ Bool_t PRunAsymmetry::GetProperDataRange(PRawRunData* runData, UInt_t histoNo[2]
   fGoodBins[2] = start[1];
   fGoodBins[3] = end[1];
 
+  // make sure that fGoodBins are in proper range for fForward and fBackward
+  if (fGoodBins[0] < 0)
+    fGoodBins[0]=0;
+  if (fGoodBins[1] > fForward.size()) {
+    std::cerr << std::endl << ">> PRunAsymmetry::GetProperDataRange **WARNING** needed to shift forward lgb,";
+    std::cerr << std::endl << ">> from " << fGoodBins[1] << " to " << fForward.size()-1 << std::endl;
+    fGoodBins[1]=fForward.size()-1;
+  }
+  if (fGoodBins[2] < 0)
+    fGoodBins[2]=0;
+  if (fGoodBins[3] > fBackward.size()) {
+    std::cerr << std::endl << ">> PRunAsymmetry::GetProperDataRange **WARNING** needed to shift backward lgb,";
+    std::cerr << std::endl << ">> from " << fGoodBins[1] << " to " << fForward.size()-1 << std::endl;
+    fGoodBins[3]=fBackward.size()-1;
+  }
+
   return true;
 }
 
diff --git a/src/classes/PRunAsymmetryRRF.cpp b/src/classes/PRunAsymmetryRRF.cpp
index 21676c3e..59ef5570 100644
--- a/src/classes/PRunAsymmetryRRF.cpp
+++ b/src/classes/PRunAsymmetryRRF.cpp
@@ -1556,6 +1556,22 @@ Bool_t PRunAsymmetryRRF::GetProperDataRange(PRawRunData* runData, UInt_t histoNo
   fGoodBins[2] = start[1];
   fGoodBins[3] = end[1];
 
+  // make sure that fGoodBins are in proper range for fForward and fBackward
+  if (fGoodBins[0] < 0)
+    fGoodBins[0]=0;
+  if (fGoodBins[1] > fForward.size()) {
+    std::cerr << std::endl << ">> PRunAsymmetry::GetProperDataRange **WARNING** needed to shift forward lgb,";
+    std::cerr << std::endl << ">> from " << fGoodBins[1] << " to " << fForward.size()-1 << std::endl;
+    fGoodBins[1]=fForward.size()-1;
+  }
+  if (fGoodBins[2] < 0)
+    fGoodBins[2]=0;
+  if (fGoodBins[3] > fBackward.size()) {
+    std::cerr << std::endl << ">> PRunAsymmetry::GetProperDataRange **WARNING** needed to shift backward lgb,";
+    std::cerr << std::endl << ">> from " << fGoodBins[1] << " to " << fForward.size()-1 << std::endl;
+    fGoodBins[3]=fBackward.size()-1;
+  }
+
   return true;
 }
 
diff --git a/src/classes/PRunSingleHisto.cpp b/src/classes/PRunSingleHisto.cpp
index ecc54987..4fa357da 100644
--- a/src/classes/PRunSingleHisto.cpp
+++ b/src/classes/PRunSingleHisto.cpp
@@ -1593,6 +1593,15 @@ Bool_t PRunSingleHisto::GetProperDataRange()
   fGoodBins[0] = start;
   fGoodBins[1] = end;
 
+  // make sure that fGoodBins are in proper range for fForward
+  if (fGoodBins[0] < 0)
+    fGoodBins[0]=0;
+  if (fGoodBins[1] > fForward.size()) {
+    std::cerr << std::endl << ">> PRunSingleHisto::GetProperDataRange **WARNING** needed to shift forward lgb,";
+    std::cerr << std::endl << ">> from " << fGoodBins[1] << " to " << fForward.size()-1 << std::endl;
+    fGoodBins[1]=fForward.size()-1;
+  }
+
   return true;
 }
 
diff --git a/src/classes/PRunSingleHistoRRF.cpp b/src/classes/PRunSingleHistoRRF.cpp
index 9f5ca781..befaf683 100644
--- a/src/classes/PRunSingleHistoRRF.cpp
+++ b/src/classes/PRunSingleHistoRRF.cpp
@@ -1003,6 +1003,15 @@ Bool_t PRunSingleHistoRRF::GetProperDataRange()
   fGoodBins[0] = start;
   fGoodBins[1] = end;
 
+  // make sure that fGoodBins are in proper range for fForward
+  if (fGoodBins[0] < 0)
+    fGoodBins[0]=0;
+  if (fGoodBins[1] > fForward.size()) {
+    std::cerr << std::endl << ">> PRunSingleHisto::GetProperDataRange **WARNING** needed to shift forward lgb,";
+    std::cerr << std::endl << ">> from " << fGoodBins[1] << " to " << fForward.size()-1 << std::endl;
+    fGoodBins[1]=fForward.size()-1;
+  }
+
   return true;
 }