While running the following code
TApplication app("myapp", 0, 0);
TFile * f = TFile::Open("file.root");
TH1 * histo = (TH1*) f -> Get("histogram");
histo -> Draw();
f -> Close();
I exit from the program by clicking on canvas
"Quit Root" as prescribed in Return from TApplication when there is no canvas
However, this causes a crash. The reasons are clear - TFile::Close() is called after having exited Root.
How to approach this problem?
Are you using the latest master branch or v6-12-00-patches branch of ROOT? If yes, I’d recommend you to try using the
v6-11-02 tag instead. The current master has some problems currently being addressed for the next release. Thanks.
I am using ROOT 6.06/09. I am not sure if I can change the tag - the Root version I am using is embedded into CMSSW.
Nevermind. Then the problem is different. Looking at your code, you can probably simply remove the lines
app.Terminate(). ROOT itself will take care of that once you exit via the menu.
No. There is still a crash after commenting out
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