Skip chamber HV analysis for chamber deactivation in case no valid start and end...

diff --git a/TPC/Base/AliTPCcalibDB.cxx b/TPC/Base/AliTPCcalibDB.cxx
index d1109160d03d8d300baa2423fd65f4aa282666f8..b59ea2a10e39636ff81d2dcd107ea82486d88bab 100644 (file)
--- a/TPC/Base/AliTPCcalibDB.cxx
+++ b/TPC/Base/AliTPCcalibDB.cxx
@@ -1646,6 +1646,15 @@ void AliTPCcalibDB::UpdateChamberHighVoltageData()
   const Int_t startTimeGRP = grp->GetTimeStart();
   const Int_t stopTimeGRP  = grp->GetTimeEnd();
 
+  //
+  // In case we use a generated GRP we cannot make use of the start time and end time information
+  // therefore we cannot calculate proper HV information and will skip this
+  //
+  if (startTimeGRP==0 && stopTimeGRP==0) {
+    AliWarning("Using a generated GRP with 'GetTimeStart()' and 'GetTimeEnd()' == 0. Cannot calculate HV information.");
+    return;
+  }
+
   //
   // check active state by analysing the scalers
   //