May be, it helps.
A.Inyakin
On Wed, 5 May 1999, Burt Holzman wrote:
> Hi, Rooters.
>
> We are trying to work with TMapFiles here, and I found the following
> simple macro causes seg faults if I do not comment out the mfile->Close()
> line at the end of the file. Other perturbations such as
> monhisto->DrawCopy() have the same behavior. Operations on the copy
> after mfile->Close() such as GetBinContent also cause segfaults.
>
> I doing something wrong, or is there a bug somewhere?
>
> ---
>
> {
> TH1S *monhisto = new TH1S("eventnr","event_nr",101,-0.5,100.5);
> TH1S *monhisto2 = new TH1S("eventnr2","event_nr2",101,-0.5,100.5);
>
> mfile = TMapFile::Create("onhistos.map","RECREATE", 10000000,"blabla");
> mfile->Add(monhisto,"eventnr");
>
> for (Int_t i = 0; i < 52; i++) {
> monhisto->Fill(i);
> mfile->Update();
> }
> monhisto2->Add(monhisto,monhisto2);
> monhisto2->Draw();
> mfile->Close();
> }
>
>
>
>
>
>
>