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Ajax 0x800a139e - Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException

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This is a migrated thread and some comments may be shown as answers.
Meenakshi Nagalingam
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Meenakshi Nagalingam asked on 30 Aug 2013, 01:20 PM
Our Project Migrated  from .Net 3.5 with Telerik 2009.2.701.35  version  to  .Net 4.5 with Telerik 2013.1.417.45 version.

After successful migration when we run the application we get the following exception but we could not get proper solution or reasons for the exception in any forums.

Exception Details
Exception : Sys.WebForms.PageRequestManagerServerErrorException

Error: "0x800a139e - Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: 
Object reference not set to an instance of an object."

Detailed Error message:
Unhandled exception at line 3, column 69963 in http://localhost:57537/...../Telerik.Web.UI.WebResource.axd?_TSM_HiddenField_=ctl00_DefaultMasterScriptManager_TSM&compress=1&_TSM_CombinedScripts_=;
;AjaxControlToolkit,+Version=4.5.7.725,+Culture=neutral,+PublicKeyToken=28f01b0e84b6d53e:en-US:f3ec7948-9e31-4562-b526-b0088d3f7327:
ea597d4b:b25378d2;Telerik.Web.UI,+Version=2013.1.417.45,+Culture=neutral,+PublicKeyToken=121fae78165ba3d4:
en-US:42f3bd03-686e........

0x800a139e - Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: 
Object reference not set to an instance of an object.
If there is a handler for this exception, the program may be safely continued


Can any help into this..

2 Answers, 1 is accepted

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Meenakshi Nagalingam
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answered on 30 Aug 2013, 02:48 PM

Issue is causing in the situation where multiple usercontrols are present inside  a page/usercontrol.  

Hence to replicate this issue, we created an isolated demo project based on our application.    The demo contains working Page as well Error producing page.  It has a Master Page, Page, Parent UserControl, Child UserControls.   If a Page contain only one usercontrol it is working well. However if it contains several Usercontrols, there comes a problem, especially when a usercontrol have several child usercontrols inside.  




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Maria Ilieva
Telerik team
answered on 04 Sep 2013, 08:55 AM
Hello Meenakshi,

The presented error is rather generic and could occur in various cases. Therefore it will be best if you cold open a  regular support ticket and send us the isolated test application which demonstrates the issue. Thus we will be able to debug it locally and advise you further.

Regards,
Maria Ilieva
Telerik
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Meenakshi Nagalingam
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Answers by
Meenakshi Nagalingam
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Maria Ilieva
Telerik team
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