TTree Fill Error

ROOT
4

You could copy the original files onto a directory you have write access to.

If that is not possible, you should consider putting the new branches in a new TTree in a new file and when using/reading the TTree, open both the original and new files and make the new TTree a friend of the old TTree.

Cheers,
Philippe.

PS.
With newer version (v6.14 and newer) of ROOT we recommend replacing

        avgBranch->Fill();

with

        avgBranch->BackFill();

to allow for better alignment of the new branches with the “clusters” of the existing TTree.

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