I was told that an POSIX executable made by c89 on HP-UX can also be executed on MPE. However I failed to make this work. The systems I am using are HP-UX 9.01 and MPE/iX 5.0. The followings shows the steps I've done. On HP9000: $ cat x.c main() { } $ c89 x.c $ ftp my_hp3000 ftp> put a.out AOUT;code=nmprg;rec=,,b On HP3000: :SH.HPBIN.SYS shell> chmod 755 AOUT shell> AOUT **** EXEC FUNCTION FAILED; subsys =517; info = 48 ABORT: AOUT NM SYS a.00a19314 dbg_abort_trace+$24 NM UNKN 1b9.002eac50 NM UNKN 480.0004bbd8 Is there anything I did wrong ? --- Best Regards, Kuo-Chien Kai ---------------------------------------------------------------- Computer & Communication Center | E-mail: [log in to unmask] National Tsing Hua University | Phone: +886-35-715131-5160 Hsinchu, Taiwan 30043 | Fax: +886-35-710776