Craig> create_child: exe=c:\BIN32\ls.exe,cmdline=c:\BIN32\ls.exe Craig> create_child.CreateProcess leads child PID -725391, Craig> changing to PID 725391 Fatal error: assertion failed, file Craig> sysdep.c, line 353, pid != NULL Hi Craig, did you ever see a message like: Fcall_process_internal.child_setup returns PID 725391, using PID -725391 If not, then if (os_subtype == OS_WIN95) would not be true for Windows 98. That would be a problem! Please let me know. Adrian