Hi, I have a class which contains strings as the members and I write it into a root file during the execution of some compiled code. Later I want to print it out, so I made a .so containing the class which I load in, then I open my file. When I open it I get a checksum warning. I don't get this problem if I use a TString. Is there something extra I need to do?? I get some message about converting basic_string's to strings so maybe this is where I'm going wrong. Thanks very much for any help, Angela -------------------------------- I have attached some test code. I do: > gmake > Validation > root root [0] .L analibs.so root [1] TFile f("test.root"); WARNING, the StreamerInfo of class SClass read from file test.root has the same version (=1) as the active class but a different checksum. You should update the version to ClassDef(SClass,2). Do not try to write objects with the current class definition, the files will not be readable. root [2] SClass* test = (SClass*) f->Get("SClass"); Cannot convert TMyName from type:basic_string<char,char_traits<char>,allocator<char> > to type:string, skip element
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