Hello Rene, thanks for the quick reply. The test results are attached, write.log for writing and read.log until the SegFault. The TString fields fLogString and fPrefix might be NULL. Could this be the reason for the problems .. ? Here is a shortened declaration of the class LogMessage: class LogMessage : public TObject { private: LogMessage(LogMessage&); // these two we don't want LogMessage& operator=(LogMessage&); UChar_t fEyeId; // the Eye from where the msg came TString *fLogString; // the log message itself UInt_t fLogTime; // time when message was generated UChar_t fMirrorId; // the Mirror from where the msg came TString *fPrefix; // prefix (origin) of the msg. enum EMessageSeverity fSeverity; // severity level of log message ClassDef(LogMessage,1) }; On Fri, 22 Mar 2002, Rene Brun wrote: > Hi, > > Could you add a statement: > fTree->Print(); > just after fTree->Write(.. > then in the program reading the file, do: > > TFile *file = new TFile( argv[1] ); > f->ShowTreamerInfo(); //<===add this line > > and > TBranch *logb = tree->GetBranch( "LogBranch" ); > logb->SetAddress( &logm ); // I assume you have LogMessage *logm = 0; I have now done it, but on the Example page it was not done instead I read there: Event *event = new Event(); //object must be created before setting the branch address > gDebug=2; //(need #include "Tsystem.h") <===add this line > > Send me the output > > Rene Brun >
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