don't use .reset to reset the interpreter environment. As
Valery explained before .reset is a "pure" CINT command that will
wipe the CINT environment without paying attention to ROOT. Afterwards
ROOT tries to access objects that have been deleted by CINT. A better
way to clean the environment (both ROOT and CINT) is to use gROOT->Reset().
Cheers, Fons.
>
> Hi!
> I've read <A HREF="http://root.cern.ch/root/roottalk/0676.html">
> Marc Mueller's question</A>. I tried about the same, and I failed
> too. But if I create the 'ifstream' class with 'new', it seems to work,
> while I don't want to reset the interpreter with the '.reset' command.
> My macro is:
>
> {
> gROOT->LoadMacro("fstream.h");
> TCanvas *c = new TCanvas("c", "The Hello Canvas", 400, 400);
> const Int_t NSLICES=512;
> Int_t h;
> Int_t value;
> TH1D *histogram[NSLICES];
> Text_t hname[100];
> for(h=0;h<NSLICES;h++) // creating histogram array
> {
> sprintf(hname,"h_%i",h);
> histogram[h]=new TH1D(hname,hname,71,109.5,170.5);
> }
> ifstream *input_file=new ifstream("data");
> while(1) // fill histograms
> {
> *input_file>>h>>value;
> if(input_file->eof()) break;
> histogram[h]->Fill(value);
> }
> return;
> }
>
>
> After running this macro I can draw the histograms in the command line:
> histogram[100]->Draw();
> But if I say '.reset' I get the following message:
>
> *** Break *** segmentation violation
>
> ( 0) 0xc0d3ede0 StackTrace__11TUnixSystemFv + 0x28
> [/afs/cern.ch/na49/library/local/ROOT/root/lib/libUnix.sl]
> ( 1) 0xc0d3d8e8 DispatchSignals__11TUnixSystemF8ESignals + 0x150
> [/afs/cern.ch/na49/library/local/ROOT/root/lib/libUnix.sl]
> ( 2) 0xc0d3c5c0 SigHandler__F8ESignals + 0x28
> [/afs/cern.ch/na49/library/local/ROOT/root/lib/libUnix.sl]
> ( 3) 0xc0d407f8 sighandler__Fi + 0x58
> [/afs/cern.ch/na49/library/local/ROOT/root/lib/libUnix.sl]
> ( 4) 0xc012f2e0 _sigreturn [/usr/lib/libc.1]
>
> and so on. What's wrong with this macro?
> Thanks
> Daniel
>
>
>
-- Org: CERN, European Laboratory for Particle Physics. Mail: 1211 Geneve 23, Switzerland Phone: +41 22 7679248 E-Mail: Fons.Rademakers@cern.ch Fax: +41 22 7677910