Bar chart access violation

mc · Post by mc » Thu Sep 08, 2005 3:28 pm

Earlier I reported intermittent access violations when a form with a bar chart was opened at some point in our app. After more than 3 weeks of investigation, I am sorry to say I am no closer to a solution than I was at the beginning. The access violation call stack never leads anywhere useful.

It is not possible to reproduce this in a teeny sample, but we can't release a product with this known instability.

I have tried numerous debugging tools without any results. Please help me.

Thanks
Marie Claire

Narcís · Post by **Narcís** » Fri Sep 09, 2005 11:03 am

Hi Marie Claire,

Does it happen on other machines? It could be a problem of that machine's graphic card or its drivers version.

mc · Post by mc » Fri Sep 09, 2005 1:05 pm

Yes, I'm afraid it does happen on other machines. I am really at my wit's end with this one.

Narcís · Post by **Narcís** » Fri Sep 09, 2005 1:16 pm

Hi Marie Claire,

Do the other machines have the same graphic card? You could try changing the driver version on the problematic machine even it's and older driver. If there's any machine with the same graphic card as yours and on which the application works, try using the same driver version.

mc · Post by mc » Sun Sep 11, 2005 3:21 pm

Narcis,

I think there is a big misunderstanding. The access violation occurs on all machines. By itermittent, I meant that the series of events that produces the violation is not always the same.

Marie Claire

PvdE · Post by **PvdE** » Sun Sep 11, 2005 4:18 pm

I have used Madshi's madExcept with good results for these types of exotic problems. You need to buy a license to deploy the exception tracking, but for your own debugging I think the eval will work.

--Paul

mc · Post by mc » Tue Sep 13, 2005 3:58 pm

Hooray! TeeChart, ego te absolvo! Mea culpa. Of course, it was my error. Slash and debug exposed the problem.

Thank you for your patience.

Marie Claire