On Thursday 10 of May 2007 18:32:34 Luca Sbardella wrote: > class_<ts, bases<ts_wrapper>>("timeserie", "An implementation of > itimeserie", init<const list&,const dict&>()); ts is not derived from ts_wrapper but from its, is it? So I think you should use bases<its>. -- Best Regards, Piotr Jaroszynski