ImplicitMT Writing issues

[imanol097]

Hi, I have a problem using ImplicitMT in RDataFrame.

While I am not using MT the scripts work well, but putting it on an Error arises:

Error in TROOT::WriteTObject: The current directory (PyROOT) is not associated with a file.

How MT could have an impact on this?

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ROOT Version: Not Provided
Platform: Not Provided
Compiler: Not Provided

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[eguiraud]

Hi @imanol097 ,
just a guess, but in older ROOT versions multi-thread writing could change ROOT’s gDirectory (i.e. you have to reset it with file.cd() to the value you want).

What ROOT version is this with? Can you provide a reproducer that we can run e.g. on LXPLUS?

Cheers,
Enrico

[imanol097]

@eguiraud ROOT version is new: ROOT 6.24/06