Re: [ROOT] Writing Histos to a File

From: Rene Brun (Rene.Brun@cern.ch)
Date: Sun Jan 13 2002 - 09:34:07 MET


Hi John,

Obviously this trivial test works with the standard ROOT executable.
Is the TFile constructor reporting an error message ?

Which version of ROOT are you using?

Rene Brun

On Sat, 12 Jan 2002 jcfree@socrates.Berkeley.EDU wrote:

> 
> I've been having a lot of trouble writing histograms to a file in my
> program. I'm using VC++ 6 on Windows 2000, and am using the QT libraries
> for my GUI interface. Even the simplest code doesn't seem to work, e.g.,
> 
> TFile* file = new TFile("e:\\rt\\testfile.root","UPDATE");
> TH1S* testhisto = new TH1S("histo","histo",100,0,100);
> testhisto->Write();
> file->Close();
> 
> will cause the program to indicate "Abnormal program termination" when
> execution reaches the "testhisto->Write()" line. Can anyone help me out?
> 
> 				Thanks,
> 
> 					John
> 



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