New index in TChain

ROOT
1

Dear all,

I am facing a problem when trying to build a new index on a TChain.

I have some files with a TTree, where an indexing is already built. When creating a TChain out of these files and trying to make a new index I get the following error:

Error in <TChainIndex::TChainIndex>: Tree in file test.root has an index built with majorname=a and minorname=b
Error in <TTreePlayer::BuildIndex>: Creating a TChainIndex unsuccessful - switching to TTreeIndex

Is there something I am missing?

Thanks for your help.

Cheers,
Antonio
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ROOT Version: 6.24/06

2

@pcanal might know?

3

Are you trying to create an index with a different major and minor names as the already existing ones?

4

Yes, I am trying to create a new index using different variables for major/minor names with respect to the one used before saving the trees.

5

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