DotNetNuke FileHelpers, Version=2.0.0.0, Culture=neutral, PublicKeyToken=3e0c08d59cc3d657′

After Upgrading DNN 7 and browsing to the ADMIN>Site Settings you find an error: A critical error has occurred. Object reference not set to an instance of an object.

FileHelpers, Version=2.0.0.0, Culture=neutral, PublicKeyToken=3e0c08d59cc3d657′

DNN file Helpers.dll

Error: File Management is currently unavailable. DotNetNuke.Services.Exceptions.ModuleLoadException: (0): error CS1705: Assembly ‘DotNetNuke.Modules.DigitalAssets, Version=7.1.1.385, Culture=neutral, PublicKeyToken=null’ uses ‘Telerik.Web.UI, Version=2013.2.611.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4’ which has a higher version than referenced assembly ‘Telerik.Web.UI, Version=2013.1.403.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4’ —> System.Web.HttpCompileException: (0): error CS1705: Assembly ‘DotNetNuke.Modules.DigitalAssets, Version=7.1.1.385, Culture=neutral, PublicKeyToken=null’ uses ‘Telerik.Web.UI, Version=2013.2.611.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4’ which has a higher version than referenced assembly ‘Telerik.Web.UI, Version=2013.1.403.40, Culture=neutral, PublicKeyToken=121fae78165ba3d4’ at System.Web.Compilation.AssemblyBuilder.Compile() at System.Web.Compilation.BuildProvidersCompiler.PerformBuild() at System.Web.Compilation.BuildManager.CompileWebFile(VirtualPath virtualPath) at System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) at System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate) at System.Web.Compilation.BuildManager.GetVPathBuildResult(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean ensureIsUpToDate) at System.Web.UI.TemplateControl.LoadControl(VirtualPath virtualPath) at DotNetNuke.UI.Modules.WebFormsModuleControlFactory.CreateModuleControl(TemplateControl containerControl, ModuleInfo moduleConfiguration) at DotNetNuke.UI.Modules.ModuleControlFactory.LoadModuleControl(TemplateControl containerControl, ModuleInfo moduleConfiguration) at DotNetNuke.UI.Modules.ModuleHost.LoadModuleControl() — End of inner exception stack trace —

The problem

The problem relates to a missing file that can be updated to the website /bin folder. The file is part of a free library that can be found here: http://sourceforge.net/projects/filehelpers/files/File%20Helpers%20Downloads/Version%202.0.0/

The file you need is: FileHelpers.dll  front he 2.0 release from way back in 2010.

The Fix

Download the file directly here: https://www.dropbox.com/s/otusnlf1jmy9f6o/FileHelpers.dll?dl=0

Extract it into the /bin folder.

And save that to the /BIN folder in your DNN website, this will fix the issue and leave any third party modules that reference it working. File Helpers DLL in DNN

Posted by InteractiveWebs

This blog is the combined blog work of the InteractiveWebs Dev Team. Together we work on a range of DotNetNuke (DNN) applications, modules, Silverlight, and Microsoft CRM Portal integration products. Our Business is website design and hosting, with a strong focus on DotNetNuke, Microsoft Dynamics CRM, Silverlight and iPhone iPad development.

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