I re-ran upgrade and found the following:
System.Data.SqlClient.SqlException: Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.
The statement has been terminated.
at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj)
at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj)
at System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async)
at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe)
at System.Data.SqlClient.SqlCommand.ExecuteNonQuery()
at DotNetNuke.Data.SqlDataProvider.ExecuteADOScript(String SQL)
at DotNetNuke.Data.SqlDataProvider.ExecuteScript(String Script, Boolean UseTransactions)



/* Fix incorrect culture codes assigned pre-5.5 */
/************************************************/

UPDATE dbo.Tabs
SET CultureCode = NULL

Hello again everyone,

As of last friday, I attempted to do another upgrade. I tried from 5.1.4 to 5.6.0. This failed as well. I did find that we had the site running in ASP.NET 2, but upon switching it to ASP.NET 4, the site would not load. We received many errors related to the web.config. Upon cleaning up all the errors, basic usability of the DNN site changed.

The lines we ended up having to remove from our web.config are:

We then cleared out the files of the "App_Browsers" folder. This allowed our site to load, but then we had a series of weird issues such as the Login page not working, or image links would show borders which originally did not.

Any thoughts on this? I feel that until we can get our current site to load in ASP.NET 4, researching the other issues is not worth the time.

Thanks.

Hi, yeah... we dont have .net 3.5 SP1 installed. Which is being resolved now.

As for my web.config, I removed the telerik entry I had in there for another module which is no longer used.

We also proivided full permissions to the App Pool, with no success.

We still have a configuration file that has 3-4 failures during updates. I did find a module that causes a failed upgrade as well, so that is being worked on as well.

Thanks for the reply! :)