Error when adding THnSparseD objects

Dear all,

I have two files which are outputs of the same analysis done on different data sets. Each file contains a TList of THnSparseD objects with well-specified names.

I want to generate a file with the same structure, where each THnSparseD   should be the sum of the two omonyme objects in the source files.

I managed to prepare a macro which reads the two files and adds up the two such histograms, but I always encounter a warning like this

Error in <TExMap::Expand>: slot 568 not empty (should never happen)

what does it mean? How can I check it?

Thanks, cheers

        Alberto Received on Tue Jul 21 2009 - 10:46:46 CEST