I had a problem with TTree lecture and I sent a mail to this list: hi, I am working with my class which contains some pointers to TArrayX. When I write it on a TTree I create a TBranch and I have two possibilities with the branch's split level . * with split level = 1. In this case I fill my TTree without problems but after that I can not read the TArrayX of my create TTree. (With ROOT 2.21/08 et 2.22/10). * with split level= 0. I can read the TArrayX with the old version (2.21/08) but with the new one (2.22/10) I have an error message Error in <TExMap::Add>: key 2 is not unique What could be the solution to work with the new version? Thanks in advance The answer was: Hi Maria, the split level=0 problem wih TArrayX has been fixed in our development version, which we hope to release real soon now. Cheers, Fons. (Thanks you for your help) Now I'm working with the new ROOT version 2.23/06 in HP and LINUX (I recompile my program, classes, dictionary and library) but, in fact I have the same error... May be I'm doing something wrong??... Maria MORA
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