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Tabbing Error in Silverlight

I am not familiar at all with Silverlight but have to fix an issue with a program that if a user clicks on a particular tab on the screen they get the following error:

Line: 58
Error: Unhandled Error in Silverlight Application
Code: 4004
Category: ManagedRuntimeError
Message: System.NullReferenceException: Object reference not set to an instance of an object.
   at xx.URP.Presentation.Silverlight.URPServices.Actions.MonitorResult.Equals(Object obj)
   at System.Windows.Controls.ContentControl.OnContentChanged(IntPtr nativeTarget, CValue& oldContentValue, CValue& newContentValue)

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The code does not break within Visual Studio during this error. Instead I get a window in IE that shows me this error. Anyone have any ideas as to what the problem could be? Browser is IE8, using VS 2010 and Silverlight 3.

Aaron Jabamani

Looks like you are trying to access an object which is not been instantiated. Can you please place the oncontentchanged method code

mathew_s

ASKER

I was able to debug the code by attaching the debugger. It seems to crash at the point that I have attached. It goes to Application_UnhandledException after the return. Do you know what needs to be changed?
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mathew_s

ASKER

Searched the entire solution for an oncontentchanged, nothing came up. I think it is a built in method from the framework.

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mathew_s

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mathew_s

ASKER

The Silverlight version being used in IE ended up being the issue.