[PD] help! my patch breaks pd!

[Miller Puckette]

Hi all,

Well, this is every software developer's nightmare...

To start with, I'd suggest trying to load the patch with dummies in place
of the abstractions, and with the "-noloadbang" flag.  There could be some
limit I don't know about in Pd's ability to handle patches with huge
numbers of subwindows (or any of a host of other possible problems..)

I do know that Pd is ungraceful when it runs out of memory; it's sometimes
hard to find out when that happens...

cheers
Miller

On Tue, Aug 21, 2001 at 02:35:58AM -0400, Greg Rippin wrote:
> Hello all,
> 
> I have been working for some time on a patch that does a realtime
> harmonic analysis of an incoming MIDI stream and constructs probability
> tables for creating second-order markov chains based on the input.  The
> patch is fairly large and complex; the probability calculating
> abstraction (fairly small in itself) is called 13x13x13 times.
> 
> Recently, pd has occasionally died when I try to open this patch, but I
> could get it to open after a few failed attempts.  Now, quite suddenly,
> it won't open at all; pd generates an invalid page fault whenever I try
> to load this patch.  It opens all other patches without trouble.  Most
> puzzling to me is that I haven't actually made any changes to the patch;
> I added some comments to the abstractions that are called by the parent
> patch, but made no functional changes immediately before this started to
> happen.   I thought that perhaps the file was corrupt; I rebuilt the
> patch from it's constituent parts, it worked perfectly.  I saved it
> under a different filename, closed it, tried to reopen it, and got the
> same error message.  I even checked my resource meters, and nothing
> (memory, etc.) seems to dip when trying to open this patch.  I'm
> stumped.
> 
> What could I have done wrong to cause behavior like this?  I'm running
> pd .33 patch 1 with the iemlib extensions on win 98.  The error message
> I get is:
> 
> PD caused an invalid page fault in
> module PD.DLL at 015f:10046e98.
> Registers:
> EAX=00960008 CS=015f EIP=10046e98 EFLGS=00210293
> EBX=00000150 SS=0167 ESP=0063da90 EBP=0063dab0
> ECX=00962838 DS=0167 ESI=00000013 FS=0fbf
> EDX=0309f00c ES=0167 EDI=00000014 GS=0000
> Bytes at CS:EIP:
> 8b 49 04 89 4a 04 8b 4d f0 8d 0c f9 89 4a 08 89
> Stack dump:
> 03100df0 00000200 0309f050 00000000 00962798 00000150 0309f00c 00000040
> 00960138 10042d20 00960138 00000003 03100df0 0309f050 00000110 00000200
> 
> Any help is greatly appreciated,
> Greg
> 
> --
> Greg Rippin, Graduate Assistant
> Music Technology Program
> New York University
> 35 West 4th Street, Suite 777
> New York, NY 10012
> 
> phone 212-998-5422
> fax 212-995-4043
> musictechgrad.info at nyu.edu
> www.nyu.edu
> 
>