Well, befor the diverse compiling efforts I checked that ncurses was installed and found that: libncurses5, libncurses6,ncurses-devel and ncurses-utils were installed! Further a "find" revealed that there were copies of "panel.h" in /usr/include/ncurses /usr/include/ncurses6/ncurses /usr/include/ncurses6/ncursesw /usr/include/ncursesw So thas before I called for help I added now: libncurses5-32bit, ncurses6-32bit and ncurses-devel-32bit. althoug it is an 64-bit system. The effect on compilation was nil! I now copied "panel.h" into my testdirectory: no effect on compilation! Next try: put it into the source-directory of "crtc.c": no effect! GPC still complains not to find "panel.h" Feel a bit helpless. Mathias Uhle PS.: I tried even an strace gpc .... and searched the output for "panel.h": did find none -- Univ.-Prof. i.R. Dr.-Ing. Mathias Uhle mathias.uhle@tu-dortmund.de