Hi, I use TTreeFormula to select interested events in a TTree. And to speed up, I activates only those variables used in the TTreeFormula. I do it via invoking "TTree::SetBranchStatus" one by one. It would be nice and more convenient to have a function in TTreeFormula to activate all the variables used inside. Thanks in advance. BTW, Rene, what is the email address of CERNLIB team ? I want to send suggestion on creating CERNLIB with PIC option at HP-UX. Thanks. Best regards --Shuwei
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