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From: "Philip_Young.XSISHQ"@XEROX.COM
Newsgroups: comp.os.vms
Subject: Re: mysterious SMG-Error
Message-ID: <870806-140848-1717@Xerox>
Date: Thu, 6-Aug-87 14:22:56 EDT
Article-I.D.: Xerox.870806-140848-1717
Posted: Thu Aug  6 14:22:56 1987
Date-Received: Sun, 9-Aug-87 10:55:19 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: world
Organization: The ARPA Internet
Lines: 12

You write that
> It's not possible to detect the error using the VMS Debugger, because
> setting a breakpoint near the end of procedure abc and stepping
> ahead lets the error disappear.

 I've had similar problems with both Pascal and PL/I related to code
optimization. When you run under the debugger you see no problem since
you must compile with /NOOPT. The same is true if you compile with
/NOOPT/DEBUG and then $RUN/NODEBUG. Is this what is happening here?

Phil Young
Xerox Corp.