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Extremely Strange Program Behavior [message #39489]

Sun, 23 May 2004 11:15

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Folks,

I have a problem with a program that is exhibiting extremely
strange behavior. I just wondered if anyone has seen this
before.

I have a relatively complicated program that uses a great
many pointers and objects and widgets wrapped up in objects.
The program actually runs perfectly, as far as I can tell. It
does what it is suppose to do (restores some files, copies some data
out of stored IDL structures, puts up a graphical user interface
etc.) and when I exit the program there is no evidence of any
leaking heap memory. All very clean and tidy.

Now, here is the strange part. If I run the program again
immediately after I exit, the program crashes the IDLDE with one
of those dreaded "instruction at whatever couldn't read
memory at some other whatever" messages. (Which I am seeing
much more frequently, I think, since I upgraded to a new,
faster computer running Window XP, but that's another story.)

Here is the kicker. If I open a window between the time
I exit the program and start it up again, it will run
perfectly for as long as I care to run it!

Naturally, I can't make a simple "example" file that
exhibits this behavior, so the chance of getting someone
at RSI to look at it is probably awfully low. Does this
ring any bells for anyone? Does anyone have a theory as
to why opening a window would help solve this problem,
whatever it happens to be?

Thanks.

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/

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[Message index]

		Extremely Strange Program Behavior By: David Fanning on Sun, 23 May 2004 11:15
		Re: Extremely Strange Program Behavior By: Nigel Wade on Wed, 26 May 2004 02:07
		Re: Extremely Strange Program Behavior By: Rick Towler on Wed, 26 May 2004 08:24
		Re: Extremely Strange Program Behavior By: David Fanning on Tue, 25 May 2004 10:54
		Re: Extremely Strange Program Behavior By: Rick Towler on Tue, 25 May 2004 10:40
		Re: Extremely Strange Program Behavior By: Marc R. Reinig on Fri, 28 May 2004 12:34
		Re: Extremely Strange Program Behavior By: Marc R. Reinig on Wed, 26 May 2004 11:25
		Re: Extremely Strange Program Behavior By: David Fanning on Wed, 26 May 2004 10:23

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