Hi Rooters, We've got a class in which we have added new members. We have incremented the ClassVersionID in the ClassDef macro. The problem is that we've got old files with the old ClassVersionID that we must read with the new structure of the class. When we only read the old files, everything is all right, the fields of the new members are all equal to 0. But when we read the old files after have read the new ones, the same fields are not equal to 0 anymore, which is very bad for us, because we are making tests on these values. So my question is: is there a way to get the ClassVersionID corresponding to the recorded data, but not the one coming from the actual structure of the data, which is what I get when I do a Class_Version() ? Another question: I have tried to modify the corresponding streamer, but it seems that it has no effect on the results. With an empty TData::Streamer() function (I mean: void TData::Streamer(TBuffer &R__b) { } ), our event display is still working!! So, if ROOT uses another Streamer, where does it get the data structure, and which streamer is it using? Thanks a lot for helping Pierre
This archive was generated by hypermail 2b29 : Sat Jan 04 2003 - 23:50:47 MET