Hi roottalk, I am trying to use TTree::MakeClass with a set of friend trees: { TFile* file = new TFile("ntuple.root","READ"); TTree* treeA = (TTree*)(file -> Get("NtpA")); TTree* treeB = (TTree*)(file -> Get("NtpB")); treeA -> AddFriend(treeB); treeA -> MakeClass(); } I'm finding that the Class generated by MakeClass only reflects the contents of treeA and not of its friend treeB. Is there a way to set this up so that MakeClass will generate a class with reference to both trees? Otherwise, is it possible to modify the MakeClass method to support this? We have a set of users that find the MakeClass method useful, and would like to make the use of friend trees with MakeClass as transparent as possible. I am using root version 3.10/01 updated 12/9/03 with gcc 3.2.2 on rh linux v9. Thanks for your help, -Sue K.
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