General Protection fault in CVI 7.0

[Jamie Fraser]

Hi Bilal,

I definitely get the GPF from the DisplayPanel() call. Starting with the original files I posted you should get it as soon as you select the Analysis>Spectrum Analyser menu option. If you don't, make sure that the top x-axis is set to Auto-Scale.

Is there any chance that the version of CVI 7.x you have is later than mine and the unnecessary scaling issue mentioned in the other thread has been fixed? Or maybe a patch has been applied?

I think we both agree that a GPF on zooming without copying the original data and with the original data area released is legitimate.

Regards

Jamie

[bilalD]

hmmmm, I dont have any updates or patches applied for CVI. I should have whatever you get straight out of the box. Just to be sure though, I'm attaching a list of all the dll's the exe uses. You can get this using dependency walker. THe CVIrte.dll is 7.0.0.393. Im running this on XP Pro with all the service packs and critical updates. Have you tried replicating this problem on another machine?

I assumed the graph with the top X axis set to autoscale is the the one on the "Spectrum Analysis" panel.

Bilal

[Jamie Fraser]

Bilal,

My CVIRTE.DLL is the same as yours. Not sure why we should get different results, but we'll let this one go now as the workaround is simple.

Thanks for your input to date.

Seeing as I have managed to contact an engineer who is keen to resolve customer issues in detail, would you be prepared to look into my ongoing problems with doing simultaneous AI and Counter operations using Traditional NI-DAQ? In a nutshell, I am convinced there is a bug in NI-DAQ that causes the counter operation to fail because of some sort of race-condition that occurs between AI and Counter generated interrupts from the DAQ device.

If you have access, I raised some detailed
questions that were never answered under UK service request number 184118.

Regards

Jamie Fraser

[bilalD]

You might get more help on that if you post it under the daq measurement hardware forum. Someone should be able to help you out on there

Bilal

[Hutchinson]

Hi,

      I have a problem working with CVI 6.0 and Windows 2000 similar to Mr. Fraser's one. When I debug my project and load the main panel, (that include a graph control with zooming function and cursors enabled)  and zoom/scroll my data, sometimes the execution breaks with a first chance General Protection Fault returned from RunUserIterface(). If I use the scroll/zoom function without load data, sometimes the problem occurs similarly.I tried to generate the same error enabling the zooming functions in the example program: graphcursors. Sometimes, I found the same error.  

My current settings in Control Graph are:

Control Mode: Hot

Data Mode: Retain

Copy original plot Data

Enable Zooming

Smooth Update

Axis with Auto divisions

Have you any suggest?

Thank you

Best Regards

Hutch

Message Edited by Hutchinson on 04-27-2006 05:52 AM