Now when I debug my silverlight app, I get the following:
Description:
Stopped working
Problem signature:
Problem Event Name: APPCRASH
Application Name: IEXPLORE.EXE
Application Version: 8.0.6001.18904
Application Timestamp: 4b835fec
Fault Module Name: Telerik.CodeWeaver.dll
Fault Module Version: 1.0.0.1
Fault Module Timestamp: 4bc32b80
Exception Code: c00000fd
Exception Offset: 00027187
OS Version: 6.0.6001.2.1.0.256.6
Locale ID: 3081
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12 Answers, 1 is accepted
The Telerik.CodeWeaver is an assembly coming from JustMock. I asked the folks around and they shared this is a bug that should be fixed shortly. In the meantime you can disable JustMock. We are sorry for the caused inconvenience!
Best wishes,
Konstantin Petkov
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items.

I face the same issue as Nick. How can I disable JustMock? I`ve got another ticket 659105 regarding this issue opened. Or is there any other solution how to avoid this issue? I want to add I`m using TestStudio Standalone Version 2012.2.1420.0.
Thanks.
Petr
Thank you for contacting Telerik support.
To assist you further, I would also require the exact version of JustMock you have installed on your machine.
Thank you for the help in advance.
Regards,
Kaloyan
the Telerik team

Well I haven`t installed any version of JustMock. I don`t use it. However, I face the issue described below. Any suggestions how to avoid it?
Thank you.
Petr
As this is strange and unexpected, I would need you to confirm if the exact "Fault Module Name" is "Telerik.CodeWeaver.dll" as this appears to be an old name of the JustMock profiler assembly.
Thank you for the help once again.
Best Regards,
Kaloyan
the Telerik team

The Fault Module Name is npctrl.dll. Please refer to the attached file as well. I`d like to add that I also sometimes experience this failure while executing a functional or load test when I want to capture an existing test. But it happens mainly for performance tests.
Thank you.
Petr
I have investigated further and it seems the npctrl.dll is a silverlight add-on causing the crash. Unfortunately we cannot be of further assistance on this, since we do not have control over the add-on, you can try to overcome this problem by disabling the add-on. I have researched further and found this article which might be useful for you. However if you google this you will find multiple issues with that particular module and other articles on how to overcome this.
Thank you for your understanding.
Ivaylo
the Telerik team
Test Studio Trainings

Well I thought it might have been a Telerik thing. Thanks for the article. I`ll try to check it out or google any other solution.
Thank you.
Petr

did anyone find the new solution?
Please note that the original issue was reported back in 2010, it is very likely you are experiencing a different issue or the cause of the crash is different.
However application crashes need to be reproduced locally in our environment in order to be investigated further. If you continue getting the crashes please submit a new thread or ticket with more detailed information.
Thank you for your understanding.
Regards,
Ivaylo
Telerik

thanks Ivaylo for your reply, i'm new with this forum thing
here's the thing now,
i'm searching about this appcrash last night and found an article about this error as you can see
http://www.deskdecode.com/how-to-fix-appcrash-some-programs-has-stopped-working/
so, i tried as they said
"Open the Startmenu and click Control Panel
Browse to System Maintenancethen System
In the left side, select Advanced System Settings
System Properties Window comes up. Select the setting from the top named Performance.
Select Data Execution Prevention.
Select Turn on DEP for all programs and services except those I select.
Use the Browsebutton to locate your file. I my case my internet explorer is not working so I’m searching for main internet explorer file and makes it in exceptions list.
Click Applyor OK ."
after that it works just dont know why but my other some program's starts to showing this error too
thanks for your reply but plz help me out from this
i'm doomed now, from no where anyone's software starts to shows this error on the screen now.
thanks in advance
Unfortunately the settings you modified and the application crashing on your machine are not Test Studio related. You can try reinstalling your OS or use another machine.
Thank you for your understanding.
Regards,
Ivaylo
Telerik