Hi! Here is the problem: Declaration in C: void Lib_initr(void) (I also tested void Lib_initr() with same result) In Gambas: Public Extern Lib_initr() In "libMlpp" And this raises error: Lib_initr() Type mismatch: Wanted Void, got Integer instead Ubuntu 10.04 64bit, Gambas3 revision 3016 Jussi