I am deploying a DNN624 instance to a production server from a staging server. Both servers run II6 and have .NET 4.0 installed. I have copied the web and restored the database from the staging to production environments, and configured the site in IIS to match the staging server. I have checked that the Network Service identity has modify ACL permissions on the whole web.

The site runs correctly on the staging server, but throws the exception below in production. Can anyone suggest the cause or a solution to this, please?

 Server Error in '/' Application.
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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.]
   DotNetNuke.HttpModules.UrlRewriteModule.RewriteUrl(HttpApplication app, String& portalAlias) +3292
   DotNetNuke.HttpModules.UrlRewriteModule.OnBeginRequest(Object s, EventArgs e) +1033
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +148
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75

 


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Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272