Hi I'm using the MakeSelector command to generate both .C and .h files to loop over my ntuple, but now I got a problem. In fact in the same analisys I have several ntuples that depending on if it is background or signal, have differences that avoid to use the same programs (the same header file). Is it possible in a header file to test if some branches exists in the current ntuple in such a way I can use only one .h and one .C file? Thanks in advance. Luiz
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