Path: utzoo!attcan!uunet!husc6!uwvax!oddjob!tank!nucsrl!bob
From: bob@eecs.nwu.edu (Bob Hablutzel)
Newsgroups: comp.sys.mac.programmer
Subject: Re: List Manager Problems?
Message-ID: <10050014@eecs.nwu.edu>
Date: 8 Sep 88 13:16:43 GMT
References: <4X9Qxoy00UsPM7VVcm@andrew.cmu.edu>
Organization: Northwestern U, Evanston IL, USA
Lines: 19

> For a program my friend and I are writing, we decided to incorporate several
> lists.  This program runs great on a standard Mac II (i.e. only one meg), but
> dies with different errors ranging from 2 to 25 to 28 when run on a Plus.
> This program does not use large amounts of memory and so these error messages
> don't make much sense.  We're also not running under Multifinder.


All these errors point to a trashed heap, and system error 28 (stack overflow)
points to recursion gone mad. Are you allocating large objects on the stack?
Do you have heavily recursive functions? Are you sure all your memory
references are valid (remember - a II can address memory bytewise, while
a plus is constrained to even addresses (for words and longwords)).

If you have it, try running under discipline. It may work wonders toward
pointing out the problems.

Bob Hablutzel		BOB@NUACC.ACNS.NWU.EDU

Disclaimer:	< Omitted on request of my lawyers >