HI,
i have tried to upgrade my DNN 4.9.5 installation to any 5.x.x version and i got this error every upgrade.
Also i got 2 SQL upgrade error on upgrade to 5.0.0 and 5.1.0 like this. ( i have translated from italian)
 

System.Data.SqlClient.SqlException: The subwuery has returned more than one value .....

Instruction stopped

   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)

/* Update IconFile References for Admin Tabs */

/*********************************************/

UPDATE dbo.Tabs 

SET IconFile = '~/images/' + IconFile

WHERE IconFile LIKE 'icon_%'

AND (TabPath LIKE '//Host%' OR TabPath LIKE '//Admin%')
 

Thanks again.

Stefano

 Hello,

I had the same problem when upgrading form DNN 5.5.0 to 5.5.1 (DLL not loaded) and your solution worked for me to complete my upgrade.

Does it mean I will have to do the same for each further upgrade ?

Or is there somehting to change in the web.config file to tell DNN where the DLL files are ?