Upon doing a search the Upgrade error listed below has been seen several times in this forum when upgrading to a few different releases of DNN v4, however, I have not seen an answer yet on what could be causing the issue. Have not noticed any symptoms of a problem yet, and I can load the portal by rebrowsing to it after the error is displayed - but the error is concerning. DNN Upgrade from 04.08.02 to 04.08.03 error. Once the files were overwritten and the new web.config file for v.4.8.3 updated with 1.) the sql connection strings (2 of them) and 2.) both the validation and decryption keys were replaced. I also turned on debugging to see what the error was - results below. ******************************************* Upgrading DotNetNuke Current Assembly Version: 04.08.03 Current Database Version: 04.08.02 Upgrade Status Report 00:00:00.015 - Upgrading to Version: 4.8.3 00:00:00.109 - Executing Script: 04.08.03.SqlDataProvider Success 00:00:00.265 - Performing General Upgrades -------------------------------------------------------------------------------- Server Error in '/portal' Application. -------------------------------------------------------------------------------- Data at the root level is invalid. Line 1, position 1. 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.Xml.XmlException: Data at the root level is invalid. Line 1, position 1. Source Error: Line 174: Line 175: 'Install Resources Line 176: ResourceInstaller.Install(True, 0) Line 177: Line 178: Response.Write("

Upgrade Complete

") Source File: C:\Inetpub\wwwroot\LocalContent\Portal\Install\Install.aspx.vb Line: 176 Stack Trace: [XmlException: Data at the root level is invalid. Line 1, position 1.] System.Xml.XmlTextReaderImpl.Throw(Exception e) +90 System.Xml.XmlTextReaderImpl.Throw(String res, String arg) +127 System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace() +1953906 System.Xml.XmlTextReaderImpl.ParseDocumentContent() +503 System.Xml.XmlTextReaderImpl.Read() +41 System.Xml.XmlLoader.Load(XmlDocument doc, XmlReader reader, Boolean preserveWhitespace) +145 System.Xml.XmlDocument.Load(XmlReader reader) +96 System.Xml.XmlDocument.Load(String filename) +160 DotNetNuke.Modules.Admin.ResourceInstaller.ResourceInstaller.InstallPortal(String strFile, Boolean writeFeedback, Int32 indent) +291 DotNetNuke.Modules.Admin.ResourceInstaller.ResourceInstaller.Install(Boolean writeFeedback, Int32 indent, String type) +961 DotNetNuke.Modules.Admin.ResourceInstaller.ResourceInstaller.Install(Boolean writeFeedback, Int32 indent) +17 DotNetNuke.Services.Install.Install.UpgradeApplication() in C:\Inetpub\wwwroot\LocalContent\Portal\Install\Install.aspx.vb:176 DotNetNuke.Services.Install.Install.Page_Load(Object sender, EventArgs e) in C:\Inetpub\wwwroot\LocalContent\Portal\Install\Install.aspx.vb:348 System.Web.UI.Control.OnLoad(EventArgs e) +99 System.Web.UI.Control.LoadRecursive() +47 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1436

Thanks, Sebastian.  The changes to web.config did not seem to be my problem.  I did find a workaround that got my installation working just fine though.

I started looking into the problem from the resourcesinstaller perspective since this is where the code errored out. 

To resolve the issue if I remove any files with the .resources extension from the Install\ subdirectories the upgrade works without a hitch.  I removed any uninstalled modules (.resources files) from the Install\Module directory and also removed any uninstalled authentication providers from the Install\Package directory.  Once these directories were cleared out the upgrade ran just fine.

Not sure if this is an bug in the installresources code or what.

-Chris