First check the output from VERSION program on both systems to ensure you have the same libraries listed. Then on the system that it runs correctly on, run it with ;LMAP. That should give you an idea where the program is resolving the external call to px_sch_yield. Mark Ranft Pro 3K -----Original Message----- From: HP-3000 Systems Discussion [mailto:[log in to unmask]] On Behalf Of John Pitman Sent: Sunday, March 24, 2013 4:17 PM To: [log in to unmask] Subject: [HP3000-L] unresolved call in posiz on 7.0 I have a piece of Lars' posix code (CONV2PDF) than runs fine on MPE 7.5, but gets an unresolved (px_sched_yield) on a 7.0 system. Is there an easy way I can provide resolution for this without having to download the source, and install gnu etc please? Regards, John Pitman ________________________________ CAUTION: This message may contain privileged and confidential information intended only for the use of the addressee named above. If you are not the intended recipient of this message you are hereby notified that any use, dissemination, distribution or reproduction of this message is prohibited. If you have received this message in error please notify RYCO Hydraulics Pty. Ltd. immediately. Any views expressed in this message are those of the individual sender and may not necessarily reflect the views of RYCO Hydraulics Pty. Ltd. * To join/leave the list, search archives, change list settings, * * etc., please visit http://raven.utc.edu/archives/hp3000-l.html * * To join/leave the list, search archives, change list settings, * * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *