I've just transferred a DNN5.6 site to a new server with a hosting.  It all looks just fine but when I navigate to the site address www.mydomin.com - I get an error:-

15/12/2010 03:06:13  Page Load Exception      AssemblyVersion: 5.6.0; PortalID: -1; PortalName ...

AssemblyVersion: 5.6.0 PortalID: -1 PortalName:  UserID: -1 UserName:  ActiveTabID: -1 ActiveTabName:  RawURL: / AbsoluteURL: / AbsoluteURLReferrer:  UserAgent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US) AppleWebKit/534.10 (KHTML, like Gecko) Chrome/8.0.552.224 Safari/534.10 DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider ExceptionGUID: d74add51-85e2-4528-983b-ab0368b1241b InnerException: Object reference not set to an instance of an object. FileName:  FileLineNumber: 0 FileColumnNumber: 0 Method: DotNetNuke.Entities.Portals.PortalSettings..ctor StackTrace:  Message: DotNetNuke.Services.Exceptions.PageLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object.at DotNetNuke.Entities.Portals.PortalSettings..ctor(Int32 tabID, PortalAliasInfo objPortalAliasInfo)at DotNetNuke.HttpModules.UrlRewriteModule.OnBeginRequest(Object s, EventArgs e)at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)--- End of inner exception stack trace ---

A dotnet Error screen appears and gives me the option to return to site - www.mydomin.com/Default.aspx and this display fine, with  no error.

In fact all pages display fine as long as I add the .aspx extension - I can access the database, all skin files - the site looks healthy.   My problem only occurs when I navigate to the domain without the Default.aspx.

I can see that my web.config file includes the lines:-

<directoryBrowse enabled="false" />
    <defaultDocument>
        <files>
            <clear />
            <add value="Default.aspx" />
        </files>
    </defaultDocument>

I'm running ASP:NET 4.0 

Thanks

Thanks Sebastian,
Any clues where I might find such a script - my googling has not turned up anything that doesn't horribly complex?

I'd rather naively following this thread:- http://www.dotnetnuke.com/tabid/795/f...
which suggests that the process is automatic.

Is ASP.NET 4.0 a recognised platform for Dotnetnuke?

Can you provide a list ot the portalaliases listed in the PortalAlias table.  Make sure to list them exactly as they appear as trailing slashes or the lack thereof were one of the items which changed in 5.6.0

---

Joe Brinkman
DNN Corp.