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Object reference not set to an instance of an object.

Posted on 2011-03-08
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Last Modified: 2012-05-11
We have a applicaton which, when our root web application pool is running .net 2 integrated, works fine.  As soon as I change it to .net 4 the application crashes. We actually have several doing that.  Here is the error...

Server Error in '/' Application.
--------------------------------------------------------------------------------

Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.  

Stack Trace:


[NullReferenceException: Object reference not set to an instance of an object.]
   ImageViewerHandler.ImageViewerHandler.ProcessRequest(HttpContext context) +226
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +596
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +265


Can anyone tell me what the object is that .net 4 is looking for and cannot find? I can't find anything!

Any help is greatly appeciated.

thanks
terri
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Question by:web-dba
2 Comments
 
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Accepted Solution

by:
pcsmitpra earned 2000 total points
ID: 35083354
I checked about image viewer, they support only asp.net 2.0 , I doubt if you can get it working on asp.net 4.
http://www.codeproject.com/KB/web-image/ThumbViewerControl.aspx
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Author Closing Comment

by:web-dba
ID: 35083712
Thanks, we can easily remove that from the site.
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