Marco, This has nothing to do with an I/O problem. You have an unsatisfied reference in your library. Were you able to create an object of your class ? Did you implement all the functions defined in your declaration file ? Check this first. Rene Brun Marco van Leeuwen wrote: > > Hi, > > I'm made my own rootclass and it seems to work, but I can't write it to > a file (although it is derived from TObject). This is the errormessage: > > libroottmp.so: undefined symbol: Class__9TMvlD0Cut > > The message pops up when I try to write it to a file (not during loading > of the shared lib). What does it mean? > > I'm using root 2.23/12 on Redhat > > Thanks, > > Marco van Leeuwen.
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