On Thu, 7 Jun 2007 email@example.com wrote: > Get this error while compiling on AIX 5.3. Maybe I gave more information > than needed, and any help will be appreciated. Thanks ahead of time. > DRXDEBUG -c ../util/softsig.c > "../util/softsig.c", line 93.26: 1506-099 (S) Unexpected argument. which is sigwait(&ss, &sigw); So what does the man page on your box say sigwait takes?