Dear roottalk, Problem 1) I have a macro in which I create a chain of root files. Each root file contains the same tree structure - the structure is built up with branches of ints, branches with floats, and branches with small histograms. In this macro, I loop over events and fill histograms, ... It turns out that from the interpreter I read the first event, process it, and then get a segmentation fault when I try to read the second event. If I insert the necessary header files so I can create an executable program, I find that the compiled macro works just fine and I can read all the events without seg faulting. Any ideas why GetEvent() raises seg faults in the interpreter for chains? Problem 2) I wish to create a object that inherits from TNamed. What are the steps required for creating TNamed objects. I've followed examples for several already existing TNamed objects, but I'm missing something. When I create an instance of my TNamed object and quit root, I get "illegal instruction". If I delete the object explicitly ("delete obj") and then quit, I don't get "illegal instruction". What have I missed? I'm running AIX 4.1.5 and ROOT V2.0/8. - Mike
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