Memory leak during repeated fitting. See macro. ROOT Version: 6.28/10 Platform: Ubuntu 20.04 example_fit.cpp (3.1 KB)

It seems that this leak is the same as in: Valgrind reports leak when constructing TChain · Issue #13130 · root-project/root · GitHub Can you try with ROOT 6.30.04 instead? I think the memory leak was fixed in the meanwhile.