Hello rooters, Here is my problem. I used the TMVAClassificationApplication.C example (it is attached) and adapted the code to classify some jet data I have. As of now I am only using the BDT method. I was filling 16 TH1F and 4 TH2F with only 100 bins in each axis while processing the tree events …

If you want to stay with ROOT 5, use your macro as ACLiC precompiled, e.g. something like: root [0] .x TMVAClassificationApplication.C++