Hi, in compiling our program in C++ for autocad 2004 and inventor we have this problem: in file string.h system sayd d:\Programme\Vc7\include\string.h fatal error C1017: Ungültiger Ausdruck für Ganzzahlkonstante (Invalid expression for Integer constant) I thing, taht I haven´t good definition of my #if - I have free If, but when I made some neu value and play the debugger - I had about 200 error :-((( Thanks for help