Re: Severe problem with PyRoot - file segmentation fault

James,

> > > > from ROOT import TFile, TH1F
> Warning in <TClassTable::Add>: class TFile already in TClassTable
> ...many more of these...
> Warning in <TClassTable::Add>: class TViewer3DPad already in TClassTable

these warnings would occur on (older) Mac's due to the way that libraries have to be linked. I've never seen it happen for a Linux box, though. What is the output of:

  $ ldd $ROOTSYS/lib/libHist.so

> Segmentation fault

Do you have a stack trace? Thanks.

> Subsequently inspecting the root file shows it to be empty:

Yes, an f.Write() is needed.

Best regards,

           Wim

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