I have a farm feature that was updated by PowerShell with the following:

Update-SPSolution -Identity FILE.wsp -LiteralPath "PATH\TO\FILE.wsp" –GACDeployment

I'm trying to deactivate and then reactivate the Farm Feature and I'm receiving the error copied below. The funny thing is the registry key it's referencing doesn't exist.


Error Failed to load receiver assembly "Microsoft.Office.SharePoint.ClientExtensions, Version=, Culture=neutral, PublicKeyToken=71e9bce111e9429c" for feature "DMS.Bcs.DmsDataService_DataServiceBCS" (ID: 8cf15518-ba61-49c1-846c-5812a3227157).: System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.Office.SharePoint.ClientExtensions, Version=, Culture=neutral, PublicKeyToken=71e9bce111e9429c' or one of its dependencies. The system cannot find the file specified. File name: 'Microsoft.Office.SharePoint.ClientExtensions, Version=, Culture=neutral, PublicKeyToken=71e9bce111e9429c' at System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) at System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) at System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) at System.Reflection.Assembly.Load(String assemblyString) at Microsoft.SharePoint.Administration.SPFeatureDefinition.get_ReceiverObject()

WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].

Troubleshoot issues with Microsoft SharePoint Foundation.

Correlation ID: 15219ac9-9552-4224-a8aa-fb3dc6cf12a9

Date and Time: 4/24/2017 2:19:52 PM

1 Answer 1


Try to install the Microsoft.Office.SharePoint.ClientExtensions dll to GAC.

Here is one similar thread for your reference. http://www.sharepoint4developers.net/en-nz/post/add-solution-failed-to-load-receiver-assembly.aspx

  • "Register the DLLs in the GAC to fix it, just copying them to the directory C:\Windows\assembly." - This does not work. I am getting Access Denied when trying to copy DLL to that folder.
    – NMJohns
    Apr 26, 2017 at 18:00

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