From: agheata <agheata@f7af4fe6-9843-0410-8265-dc069ae4e863>
Date: Mon, 27 Aug 2012 07:15:11 +0000 (+0000)
Subject: Avoid redefining MC handler or its settings and rather issue an error message if... 
X-Git-Url: http://git.uio.no/git/?a=commitdiff_plain;h=c21d72d6ab0025beade0166c7d678f92e17e03e9;p=u%2Fmrichter%2FAliRoot.git

Avoid redefining MC handler or its settings and rather issue an error message if it is not present.
---

diff --git a/PWGPP/macros/AddTaskITSsaTracks.C b/PWGPP/macros/AddTaskITSsaTracks.C
index d84214a5189..20f10cab775 100644
--- a/PWGPP/macros/AddTaskITSsaTracks.C
+++ b/PWGPP/macros/AddTaskITSsaTracks.C
@@ -27,9 +27,11 @@ AliAnalysisTaskITSsaTracks *AddTaskITSsaTracks(Bool_t readMC=kFALSE,Bool_t UseMC
   
   // Add MC handler (for kinematics)
   if(readMC){
-    AliMCEventHandler* handler = new AliMCEventHandler;
-    handler->SetReadTR(kFALSE);
-    mgr->SetMCtruthEventHandler(handler);
+    AliMCEventHandler* handler = (AliMCEventHandler*)mgr->GetMCtruthEventHandler();
+    if (!handler) {
+      ::Error("AddTaskITSsaTracks","Macro called with readMC=true but MC handler not present");
+      return 0;
+    }
   }
   // Create and configure the task
   AliAnalysisTaskITSsaTracks *taskits = new AliAnalysisTaskITSsaTracks();