Ok, the next I would do is to see what is OSG trying to print in this stack frame (the ninth from the beginning): osg130-osgUtild.dll!std::operator<<<std::char_traits<char> >(std::basic_ostream<char,std::char_traits<char> > & _Ostr, const char * _Val) Line 806 C++ maybe that could serve as a hint... -- Alberto