I successfully moved seven single portal DNN 5.06 sites from Server 2006/IIS6 to Server 2008/IIS7 all using SQL Express 2008.

Two additional sites did NOT move successfully. Both of these sites are milti-portal [two each]. Navigating to either of these sites results in the error below: 

I double checked the bindings and all other site setting they all look correct. I checked the portalalias table and the entries there appear to be in order but I am not that familiar with DDN tables so I may need to alter something.

I look forward to a little help - thank you - Robert Baker

==================== 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.]
   DotNetNuke.Entities.Portals.PortalSettings..ctor(Int32 tabID, PortalAliasInfo objPortalAliasInfo) +50
   DotNetNuke.HttpModules.UrlRewriteModule.OnBeginRequest(Object s, EventArgs e) +2332
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +148
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1

William,

Thank you for your quick response. Here are the answers to your questions:

Were these sites all upgraded from earlier DNN versions to 5.06.00 or were some new installs of 5.06.00?

· No new installs – all sites were simply moved straight up from IIS 6 to IIS7

If upgrades, were the upgrades all done prior to the server migration or afterwards?

· I moved all nine sites first.

· Seven converted perfectly so I then upgraded the seven single portal sites from 5.05 to 5.06 without issue.

· Two sites failed giving me the error message I provided.

· I attempted to upgrade the two failed sites to 5.06 hoping that it might fix things but I got the same error message.

Can you confirm that the errors did not occur prior to the server migration?

· Prior to the move all nine sites were working without issue on the old server. I moved them due to a failure to perform by my former ISP/

It is especially interesting to note that this only occurred on the multi-portal sites.

· Verified – absolutely the problem only exists with the multi-portal sites.

I can easily re-create one of the two multi-portal sites as there has not been much done; however, I really need to get the two portals on the other site running before Monday. I there any way to split the two portals into theri own sites?

Thank you,

Robert Baker

William,

Both sites were running under ASP.Net 4.0 to 2.0 / IIS 6. I managed to sucessfully restore one of them from a backup, back to the old server [Server 2006 IIS 6]. I am currently in the process of restoring the second site. The old server is painfully slow and I mean really painfull; the restore this site took over an hour. Once I get the second one running I'd like to move both of them to my new server and upgraded them from 5.05 to 5.06. What recommendations migth you suggest?

Thank you,

Robert Baker