Abend with R14 pointing to SVC3 matches what happens if your program issues PR when the stack is empty. That's the most "normal" way to get this "impossible" condition.
On Thu, Feb 26, 2026 at 6:32 AM Binyamin Dissen < [email protected]> wrote: > Why are you so sure that the top task abended? > > On Wed, 25 Feb 2026 18:13:23 +0000 Joseph Reichman > <[email protected]> wrote: > > :>I am in hard loop waitting for the task to do a wait on a TCB so I keep > on looping looking for the X’80’ > :> > :>What I am trying to do is make sure the subtask gets to certain point of > sitting for work > :> > :>So the code in the main task is somewhat > :>Checktask > :>TM 0(R10),x’80’ > :>BO. Next task > :> Stimer wait a bit > :>B checktask > :>Bexttask > :> > :>While waitting I due issue the stimer a few times > :>All of sudden I get a abend with r14 pointing to SVC 3 > :> > :>How can that be > :> > :>I think it has something to do with debugging multitasking programs > :> > :>Thanks > :> > :>Get Outlook for iOS<https://aka.ms/o0ukef> > :>________________________________ > :>From: IBM Mainframe Discussion List <[email protected]> on > behalf of Mike Shaw <[email protected]> > :>Sent: Wednesday, February 25, 2026 9:26:19 AM > :>To: [email protected] <[email protected]> > :>Subject: Re: Debugging multitasking applications > :> > :>> > :>> But I have been getting abends that don’t make sense I’m sure it has > to do > :>> that the reason behind is because it is a multitasking application > :>> <snip> > :> > :> > :>Joseph, > :> > :>That is a *huge* assumption; why are you sure of that? > :> > :>When you say "abends that don't make sense", what do you mean, exactly? > Why > :>don't they make sense? Give us more information if you really want > help... > :> > :>Mike Shaw > :>MVS/QuickRef Support Group > :>Chicago-Soft, Ltd. > :> > :>---------------------------------------------------------------------- > :>For IBM-MAIN subscribe / signoff / archive access instructions, > :>send email to [email protected] with the message: INFO IBM-MAIN > :> > :>---------------------------------------------------------------------- > :>For IBM-MAIN subscribe / signoff / archive access instructions, > :>send email to [email protected] with the message: INFO IBM-MAIN > > -- > Binyamin Dissen <[email protected]> > http://www.dissensoftware.com > > Director, Dissen Software, Bar & Grill - Israel > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
