• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 497
  • Last Modified:

App causes a page fault in kernel32.

Every time my DELPHI Application closes I got the error:

APP caused an invalid page fault in module KERNEL32.DLL at 0167:bff9db61

Does anybody knows what things may causing this application crash? (I got the error only in win 98 machines).
I have certified that every object created is freed.
The application use a lot of COM.  I do not call _Release for the COM Interfaces created, instead I assigned nil.
I got some threads too but they are all finished and destroyed before the application closes.
0
MauricioMaia
Asked:
MauricioMaia
1 Solution
 
RobnCommented:
Do you have any finailzation code in your application? Does this happen if you emulate the application closing by freeing the objects on a button click but not actually closing the app?
0
 
Russell LibbySoftware Engineer, Advisory Commented:

Well, it could be a couple of things that are causing this error (Win98 was not one of the most stable platforms to run on).

1.) Make sure you have all updates for the win98 systems, as well, you might want to check and make sure it is Win98 second edition (right click My Computer, select properties, it will tell you on first sheet of dialog what the version is)

2.) Have you taken a look at the MSDN site? If so, have you checked the things that they mention there? I am posting the link (invalid page fault common issues) in case you haven't.

http://support.microsoft.com/common/canned.aspx?R=d&H=Windows%2098%20Invalid%20Page%20Fault%20Articles&LL=kbwinmesearch%20or%20kbwinme&Sz=kbinvalidpagefault&CDID=EN-US-KB&LCID=1033

3.) Are you automating anything related to IE explorer, and if so, do you have the latest updates for IE?

Just some things to take a look at. If you could provide some more info (computer type, installed memory, free disk space, os version and service packs, com objects that you are using, modules in use when you app is running, etc), then it may be easier to narrow down the exact problem

Regards,
Russell

0
 
MadshiCommented:
If you're using madExcept, please update to the very latest version (2.6a), cause the former version 2.6 sometimes lead to such problems...  :-(
0
Cloud Class® Course: Certified Penetration Testing

This CPTE Certified Penetration Testing Engineer course covers everything you need to know about becoming a Certified Penetration Testing Engineer. Career Path: Professional roles include Ethical Hackers, Security Consultants, System Administrators, and Chief Security Officers.

 
MauricioMaiaAuthor Commented:
Rodn,

I have freed all the objects and dereferenced all the interfaces on a button click event, but I did not get the same error. Things work fine.

rllibby

Before I post this question I have update my Windows with the latest services packs, the same for the IE. Nothing works.
I take a look at the Microsoft site you say, this site does not seem to have one situation that fits with mine.
And don't use nothing related with IE automation, the program does a video capture. (Interfaces came from Directshow). But the problem doesn't seem to be related with the Video Capture cause I have separated the capture code apart and the error did not appear.


madshi

No, I`m not using madExcept.

0
 
delphizedCommented:
Can I suggest you to have another look at your threads?
Are their exceptions handled? (if they raise an exception not managed, it goes in a AV).
Do you use BDE?
Sometimes it makes funny triks and make a programmer go crazy.
Did you looked at the event log when your appl. crashes?
Probably a dll that is unloaded...

good luck!!
0
 
MauricioMaiaAuthor Commented:
Thanks for the help guys, but I found the answer to my problem of another way.

First I used the unit MemCheck (http://v.mahon.free.fr/pro/freeware/memcheck). The unit indicated a leak of memory that seem's to be at a free db component that I was using. Since I only have the dcus I removed the component and the error did not appear anymore.

0
 
RobnCommented:
Glad to hear that you have sorted it out.

Regards,
Rob
0
 
YensidModCommented:
Question is PAQed and 400 points refunded.

YensidMod
Experts Exchange Moderator
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Get your problem seen by more experts

Be seen. Boost your question’s priority for more expert views and faster solutions

Tackle projects and never again get stuck behind a technical roadblock.
Join Now