Hi,

we moved a site from one server to another. But certain pages especially with tabid in the URLs, giving out an exception. Can someone tell me what does the error mean ? like Nukelet2.DotNetNuke.View.OnLoad(EventArgs e) +52  What could be the issue. This was working fine on earlier server.

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.

[NullReferenceException: Object reference not set to an instance of an object.] 
 Nukelet2.DotNetNuke.View.OnLoad(EventArgs e) +52 
System.Web.UI.Control.LoadRecursive() +50 
System.Web.UI.Control.LoadRecursive() +141 
System.Web.UI.Control.LoadRecursive() +141 
System.Web.UI.Control.LoadRecursive() +141 
System.Web.UI.Control.LoadRecursive() +141 
System.Web.UI.Control.LoadRecursive() +141 
System.Web.UI.Control.LoadRecursive() +141 
System.Web.UI.Control.LoadRecursive() +141 
System.Web.UI.Control.LoadRecursive() +141 
System.Web.UI.Control.LoadRecursive() +141 
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627 

[PageLoadException: Object reference not set to an instance of an object.] 
DotNetNuke.Services.Exceptions.Exceptions.ProcessPageLoadException(Exception exc, String URL) +325 
DotNetNuke.Framework.PageBase.Page_Error(Object Source, EventArgs e) +379 
System.Web.UI.TemplateControl.OnError(EventArgs e) +8690922 
System.Web.UI.Page.HandleError(Exception e) +84 
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +6776 
System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +242 
System.Web.UI.Page.ProcessRequest() +80 
System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +21 
System.Web.UI.Page.ProcessRequest(HttpContext context) +49 
ASP.default_aspx.ProcessRequest(HttpContext context) +4 
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +181 
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75 

Yes, I did. Unfortunately, I am not able to login to admin even :( it has .Net 4.0 and is a windows server 2008 R2. I am running 4.9.0.85 (taken from App_Code\Assembly) . How can I troubleshoot further ? It as Nukelet2.dll and Nukelet2.DotNetNuke.dll in the Temporary ASP.Net file directories, under assembly. I am not able to see the source errors even.