Bug fix for the case HLT is running but no track found in the TRD (Raphaelle)

diff --git a/TRD/AliTRDPreprocessor.cxx b/TRD/AliTRDPreprocessor.cxx
index 0d0fdf607aae543b0b3bc5c316ef01668d9d47db..b32bbc004fa8be186e73b7b69bc5aaf80acaf802 100644 (file)
--- a/TRD/AliTRDPreprocessor.cxx
+++ b/TRD/AliTRDPreprocessor.cxx
@@ -784,8 +784,8 @@ Bool_t AliTRDPreprocessor::ExtractHLT()
     
     // gain
     TH2I *histogain = (TH2I *) filehlt->Get("CH2d");
-    histogain->SetDirectory(0);
     if (histogain) {
+      histogain->SetDirectory(0);
       // store the reference data
       if(!StoreReferenceData("HLTData","Gain",(TObject *) histogain,&metaData)){
        Log("Error storing 2D histos for gain");
@@ -823,8 +823,8 @@ Bool_t AliTRDPreprocessor::ExtractHLT()
     // vdrift
     fVdriftHLT = kFALSE;
     TProfile2D *histodriftvelocity = (TProfile2D *) filehlt->Get("PH2d");
-    histodriftvelocity->SetDirectory(0);
     if (histodriftvelocity) {
+      histodriftvelocity->SetDirectory(0);
       // store the reference data
       if(!StoreReferenceData("HLTData","VdriftT0",(TObject *) histodriftvelocity,&metaData)){
        Log("Error storing 2D Profile for average pulse height (HLT)");
@@ -877,8 +877,8 @@ Bool_t AliTRDPreprocessor::ExtractHLT()
     
     // prf
     TProfile2D *histoprf = (TProfile2D *) filehlt->Get("PRF2d");
-    histoprf->SetDirectory(0);
     if (histoprf) {
+      histoprf->SetDirectory(0);    
       // store reference data
       if(!StoreReferenceData("HLTData","PRF",(TObject *) histoprf,&metaData)){
        Log("Error storing the 2D Profile for Pad Response Function");
@@ -1089,3 +1089,4 @@ UInt_t AliTRDPreprocessor::ProcessDCSConfigData()
 }
 
 
+