Cannot extract ROOT files

[dwielane]

Hi,
I have a program that contains custom classes. Each class contains some histograms.
Everything works until I made update of the system and ROOT. Now it seems that cannot convert my files into HTML.
To explain - during exporting to HTML I’m doing something like

Bool_t batch = gROOT->IsBatch();
      gROOT->SetBatch(kTRUE);
      TCanvas* c = new TCanvas("canvas", "canvas", 0, 0, 1000, 1500);
      c->Divide(2, 1);
      c->cd(1);
      TH1D* hKt = (TH1D*) fNumProp->Clone();
      hKt->Draw();
      c->cd(2);
      hKt = (TH1D*) fDenProp->Clone();
      hKt->Draw();

      c->SaveAs(Form("%s/corrfunc_%i/kt.root", dir.Data(), counter));
      // delete c;
      gROOT->SetBatch(batch);

The problem is that when I delete canvas (call delete c) code crash. I noticed that that I get a plenty of warning like “Error in TList::Clear: A list is accessing an object (0x55f5bc44f890) already deleted (list name = TList)”.
I know that in ROOT there was some change in storage format and probably this is the source of my problem. Question is: is there some workaround? I tried SetDirectory(0x0) to histogram, I tried to clone inner histograms - nothing helps.

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_ROOT Version:6.26/06
Platform: Not Provided
Compiler: Not Provided

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[dwielane]

Edit: I noticed that also creation of TCanvas might generate problems if few of canvases have the same name (probably ROOT now manage memory by names of objects and this generate problems).

[Danilo]

Hi,

Do you have the same problem with ROOT 6.32.04, the latest stable?

Cheers,
Danilo

[dwielane]

Hi,
I have no problems with newer ROOT. So I think I can make this problem as solved.