jluoni wrote: > I looked at the server/mapping.c file, but it didn't get me anywhere. I am new to this stuff and don't know much about linux. Then don't use shared memory for IPC. Use the most simplistic (and most idiot-proof) IPC - nameless/named pipes. If you want to get more sophisticated - use sockets. Shared memory is a huge PITA, especially mixing win32, Wine & POSIX implementations of it.