Hi Vladimir,
Could you try with version 3.04/02 ?
If the problem persists, send me a running macro reproducing the problem
and tell me how to access your two files.
Rene Brun
On Fri, 10 Jan 2003, Vladimir Morozov wrote:
> Dear ROOT folks:
> I'm working in ROOT Version 3.02/07
> I'm stuck with the following situation - I have 2 files each with a TTree
> named 'uDst'. For simplicity, suppose each uDst tree has 3 variables in each
> event : variable1, variable2 and variable3.
> I'd like to open those two files in the same macro, and draw some histos.
> When drawing my histos I have some selection that I apply to TTrees. Here's
> a generic macro i'm talking about
>
> void mymacro()
> {
> TFile *f1 = new TFile("f1.root");
> TTree *t1 = uDst;
> TH1F *hist1 = blah blah blah
> t1->Draw("variable3>>hist1","(abs(variable1)+abs(variable2))<5");
>
> TFile *f2 = new TFile("f2.root");
> TTree *t2 = uDst;
> TH1F *hist2 = blah blah blah
> t2->Draw("variable3>>hist2","(abs(variable1)+abs(variable2))<5");
> }
>
> When the macro comes to line "t2->Draw .... " ROOT crashes with the message:
> *** Break *** segmentation violation
> Root > Function helper() busy flag cleared
>
>
> I've noticed that if I only try to open 1 file (either 1 or 2 ) in a macro,
> it all works. Oddly, it also works fine if I change my selection condition
> from
> (abs(variable1)+abs(variable2))<5
> to just variable1<5 or variable2<5
> but that's not the selection that I want ...
>
> What am I doing wrong ??
>
> Thank you,
> Vladimir
>
>
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