Hi everyone, I've attached a little project that illustrates a problem I'm having. Just untar and type make to generate a ROOT file containing a branch which has a non-alphanumeric in the name (in this case it's a '/', but I see the same behavior for other characters). The object on the branch has a TClonesArray of Int_t's. Nothing too complicated. In ROOT 3.01/06, the following: root [1] T.Draw("f[].i") produces what you'd expect - a histogram of all the values of 'i' for all the events in the file. In ROOT 3.02/07 (or 3.03/02), I get the following: root [1] T.Draw("f[].i") *ERROR 26 : Unknown name : "f[].i" I've tried stepping through TTreeFormula::DefinedVariable - the change in behavior seems to be localized there, or perhaps in something called from there - but that's fairly convoluted code. This is a hugely simplified cartoon of some of our code, so I'm interested in a continuation of the original behavior. Any pointers would be welcome. Dave
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