Hi Benoit, Classes not deriving from TObject (like your class Data) require the implementation of an operator << in case you have members of the type Data *Fadc; like in your class Detector. You have 3 options: - implement the operator << for Data or - derive Data from TObject or - simply declare Data *Fadc; //-> Declaring the string "->" as first characters in the data member comment field tells Root that it can assume that the pointer Fadc is not null (your case). In this case, there is no need for an operator Rene Brun Benoit Revenu wrote: > > Dear rooters, > > I'm trying to write some object using the TObject etc. functionalities. > Everything works well with root 3-03-09 but it fails with 3-04-02 and > 3-05-05 with exactly the same code. > > The files are given in attachment, the code is very simple (stupid test > classes but producing the problem I have). > > I would like these progs to work in any root versions... What changes has > been done in recent root releases so that it does not work anymore ? > > Thanks for any advice > > Benoit > > -------------------------------------------------------------------------------- > Name: io.h > io.h Type: Plain Text (TEXT/PLAIN) > Encoding: BASE64 > > Name: io.cc > io.cc Type: Plain Text (TEXT/PLAIN) > Encoding: BASE64 > > Name: ioLinkDef.h > ioLinkDef.h Type: Plain Text (TEXT/PLAIN) > Encoding: BASE64 > > Name: requirements > requirements Type: Plain Text (TEXT/PLAIN) > Encoding: BASE64
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