Dear ROOTers, trying to create a chain of several ROOT files I hit the following naming problem (I'm using ROOT v3.02): root [0] TChain* chain = new TChain("STNTUPLE"); root [1] chain->Add("/cdf/data08/muon/aa019482.stntuple"); Error in <TChain::AddFile>: a chain element name must contain the string .root If I'm reading the diagnostics right, it that one can't chain the files with the extention different from .root. If so, I'm wondering if there is a real reason to having such a restriction? thanks, Pasha
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