diff --git a/src/external/MusrRoot/TMusrRunHeader.cpp b/src/external/MusrRoot/TMusrRunHeader.cpp
index a129dafd..11029a2a 100644
--- a/src/external/MusrRoot/TMusrRunHeader.cpp
+++ b/src/external/MusrRoot/TMusrRunHeader.cpp
@@ -214,9 +214,9 @@ ClassImp(TMusrRunHeader)
 /**
   * <p>Constructor.
   *
-  * \param quite if set to true, warnings will be omited. Default is false.
+  * \param quiet if set to true, warnings will be omited. Default is false.
   */
-TMusrRunHeader::TMusrRunHeader(bool quite) : fQuite(quite)
+TMusrRunHeader::TMusrRunHeader(bool quiet) : fQuiet(quiet)
 {
   Init();
 }
@@ -228,11 +228,11 @@ TMusrRunHeader::TMusrRunHeader(bool quite) : fQuite(quite)
   * <p>Constructor.
   *
   * \param fileName file name of the MusrRoot file.
-  * \param quite if set to true, warnings will be omited. Default is false.
+  * \param quiet if set to true, warnings will be omited. Default is false.
   */
-TMusrRunHeader::TMusrRunHeader(const char *fileName, bool quite)
+TMusrRunHeader::TMusrRunHeader(const char *fileName, bool quiet)
 {
-  fQuite = quite;
+  fQuiet = quiet;
   Init(TString(fileName));
 }
 
@@ -564,7 +564,7 @@ void TMusrRunHeader::Set(TString pathName, TString value)
   UInt_t i=0;
   for (i=0; i<fStringObj.size(); i++) {
     if (!fStringObj[i].GetPathName().CompareTo(pathName, TString::kIgnoreCase)) {
-      if (!fQuite)
+      if (!fQuiet)
         cerr << endl << ">> **WARNING** " << pathName.Data() << " already exists, will replace it." << endl;
       fStringObj[i].SetType("TString");
       fStringObj[i].SetValue(value);
@@ -598,7 +598,7 @@ void TMusrRunHeader::Set(TString pathName, Int_t value)
   UInt_t i=0;
   for (i=0; i<fIntObj.size(); i++) {
     if (!fIntObj[i].GetPathName().CompareTo(pathName, TString::kIgnoreCase)) {
-      if (!fQuite)
+      if (!fQuiet)
         cerr << endl << ">> **WARNING** " << pathName.Data() << " already exists, will replace it." << endl;
       fIntObj[i].SetType("Int_t");
       fIntObj[i].SetValue(value);
@@ -632,7 +632,7 @@ void TMusrRunHeader::Set(TString pathName, Double_t value)
   UInt_t i=0;
   for (i=0; i<fDoubleObj.size(); i++) {
     if (!fDoubleObj[i].GetPathName().CompareTo(pathName, TString::kIgnoreCase)) {
-      if (!fQuite)
+      if (!fQuiet)
         cerr << endl << ">> **WARNING** " << pathName.Data() << " already exists, will replace it." << endl;
       fDoubleObj[i].SetType("Double_t");
       fDoubleObj[i].SetValue(value);
@@ -666,7 +666,7 @@ void TMusrRunHeader::Set(TString pathName, TMusrRunPhysicalQuantity value)
   UInt_t i=0;
   for (i=0; i<fMusrRunPhysQuantityObj.size(); i++) {
     if (!fMusrRunPhysQuantityObj[i].GetPathName().CompareTo(pathName, TString::kIgnoreCase)) {
-      if (!fQuite)
+      if (!fQuiet)
         cerr << endl << ">> **WARNING** " << pathName.Data() << " already exists, will replace it." << endl;
       fMusrRunPhysQuantityObj[i].SetType("TMusrRunHeader");
       fMusrRunPhysQuantityObj[i].SetValue(value);
@@ -700,7 +700,7 @@ void TMusrRunHeader::Set(TString pathName, TStringVector value)
   UInt_t i=0;
   for (i=0; i<fStringVectorObj.size(); i++) {
     if (!fStringVectorObj[i].GetPathName().CompareTo(pathName, TString::kIgnoreCase)) {
-      if (!fQuite)
+      if (!fQuiet)
         cerr << endl << ">> **WARNING** " << pathName.Data() << " already exists, will replace it." << endl;
       fStringVectorObj[i].SetType("TStringVector");
       fStringVectorObj[i].SetValue(value);
@@ -734,7 +734,7 @@ void TMusrRunHeader::Set(TString pathName, TIntVector value)
   UInt_t i=0;
   for (i=0; i<fIntVectorObj.size(); i++) {
     if (!fIntVectorObj[i].GetPathName().CompareTo(pathName, TString::kIgnoreCase)) {
-      if (!fQuite)
+      if (!fQuiet)
         cerr << endl << ">> **WARNING** " << pathName.Data() << " already exists, will replace it." << endl;
       fIntVectorObj[i].SetType("TIntVector");
       fIntVectorObj[i].SetValue(value);
@@ -768,7 +768,7 @@ void TMusrRunHeader::Set(TString pathName, TDoubleVector value)
   UInt_t i=0;
   for (i=0; i<fDoubleVectorObj.size(); i++) {
     if (!fDoubleVectorObj[i].GetPathName().CompareTo(pathName, TString::kIgnoreCase)) {
-      if (!fQuite)
+      if (!fQuiet)
         cerr << endl << ">> **WARNING** " << pathName.Data() << " already exists, will replace it." << endl;
       fDoubleVectorObj[i].SetType("TDoubleVector");
       fDoubleVectorObj[i].SetValue(value);
@@ -843,8 +843,8 @@ Bool_t TMusrRunHeader::ExtractHeaderInformation(TObjArray *headerInfo, TString r
 
       // get the run header label
       label = GetLabel(str);
-      if (label == "n/a")
-        return false;
+      if (label == "n/a") // not a TMusrRunHeader object, hence ignore it
+        continue;
 
       // get the run header 'value'
       strValue = GetStrValue(str);
@@ -854,6 +854,8 @@ Bool_t TMusrRunHeader::ExtractHeaderInformation(TObjArray *headerInfo, TString r
 
       // get type from map
       type = GetType(str);
+      if (type == "n/a") // not a TMusrRunHeader object, hence ignore it
+        continue;
 
       if (type == "TString") {
         Set(pathName, strValue);
@@ -1302,7 +1304,10 @@ TString TMusrRunHeader::GetLabel(TString str)
   Ssiz_t idx1 = str.First('-');
   Ssiz_t idx2 = str.First(':');
   if ((idx1 == -1) || (idx2 == -1)) {
-    cerr << endl << ">> TMusrRunHeader::GetLabel(): **ERROR** str='" << str << "', seems not correctly encoded." << endl;
+    if (!fQuiet) {
+      cerr << endl << ">> TMusrRunHeader::GetLabel(): **WARNING** str='" << str << "', seems not correctly encoded.";
+      cerr << endl << ">>   Will omit it." << endl;
+    }
     return label;
   }
 
@@ -1331,7 +1336,10 @@ TString TMusrRunHeader::GetStrValue(TString str)
   Ssiz_t idx1 = str.First(':');
   Ssiz_t idx2 = str.Last('-');
   if ((idx1 == -1) || (idx2 == -1)) {
-    cerr << endl << ">> TMusrRunHeader::GetStrValue(): **ERROR** str='" << str << "', seems not correctly encoded." << endl;
+    if (!fQuiet) {
+      cerr << endl << ">> TMusrRunHeader::GetStrValue(): **WARNING** str='" << str << "', seems not correctly encoded.";
+      cerr << endl << ">>   Will omit it." << endl;
+    }
     return strValue;
   }
 
@@ -1359,7 +1367,10 @@ TString TMusrRunHeader::GetType(TString str)
   Ssiz_t pos = str.Last('@');
 
   if (pos == -1) { // i.e. NOT found
-    cerr << endl << ">> TMusrRunHeader::GetType(): **ERROR** str=" << str << " seems to be an invalid MusrROOT run header string." << endl;
+    if (!fQuiet) {
+      cerr << endl << ">> TMusrRunHeader::GetType(): **WARNING** str=" << str << " seems to be an invalid MusrROOT run header string.";
+      cerr << endl << ">>   Will omit it." << endl;
+    }
     return result;
   }
 
diff --git a/src/external/MusrRoot/TMusrRunHeader.h b/src/external/MusrRoot/TMusrRunHeader.h
index 0e18acf7..77211e44 100644
--- a/src/external/MusrRoot/TMusrRunHeader.h
+++ b/src/external/MusrRoot/TMusrRunHeader.h
@@ -125,8 +125,8 @@ private:
 class TMusrRunHeader : public TObject
 {
 public:
-  TMusrRunHeader(bool quite=false);
-  TMusrRunHeader(const char *fileName, bool quite=false);
+  TMusrRunHeader(bool quiet=false);
+  TMusrRunHeader(const char *fileName, bool quiet=false);
   virtual ~TMusrRunHeader();
 
   virtual TString GetFileName() { return fFileName; }
@@ -158,7 +158,7 @@ public:
   virtual void DrawHeader();
 
 private:
-  bool fQuite;
+  bool fQuiet;
   TString fFileName;
   TString fVersion;
 
diff --git a/src/read_musrRoot_runHeader.cpp b/src/read_musrRoot_runHeader.cpp
index 774b2d03..062b53c2 100644
--- a/src/read_musrRoot_runHeader.cpp
+++ b/src/read_musrRoot_runHeader.cpp
@@ -50,21 +50,35 @@ void closeFile(TFile *f)
 
 void read_musrRoot_runHeader_syntax()
 {
-  cout << endl << "usage: read_musrRoot_runHeader [<fileName>] | --version";
+  cout << endl << "usage: read_musrRoot_runHeader [<fileName> [--all-messages]] | --version";
   cout << endl << "       <fileName> is the file name including the extention root, e.g. test.root";
+  cout << endl << "       --all-messages: display all warnings.";
+  cout << endl << "       --version: display the current version.";
   cout << endl << endl;
 }
 
 int main(int argc, char *argv[])
 {
-  if (argc != 2) {
+  if (argc == 1) {
     read_musrRoot_runHeader_syntax();
-    return 1;
+    return -1;
   }
 
-  if (!strcmp(argv[1], "--version")) {
-    cout << endl << "read_musrRoot_runHeader version: " << PMUSR_VERSION << " / $Id$" << endl << endl;
-    return 0;
+  if (argc == 2) {
+    if (!strcmp(argv[1], "--version")) {
+      cout << endl << "read_musrRoot_runHeader version: " << PMUSR_VERSION << " / $Id$" << endl << endl;
+      return 0;
+    }
+  }
+
+  bool quiet = true;
+  if (argc == 3) {
+    if (!strcmp(argv[2], "--all-messages")) {
+      quiet = false;
+    } else {
+      read_musrRoot_runHeader_syntax();
+      return -1;
+    }
   }
 
   // read the file back and extract the header info
@@ -82,7 +96,7 @@ int main(int argc, char *argv[])
     return -1;
   }
 
-  TMusrRunHeader *header = new TMusrRunHeader(argv[1]);
+  TMusrRunHeader *header = new TMusrRunHeader(argv[1], quiet);
 
   if (!header->ExtractAll(runHeader)) {
     cerr << endl << ">> **ERROR** couldn't extract all RunHeader information :-(" << endl << endl;