Office Web App 2010 Viewers do not work, System.ServiceModel.EndpointNotFoundException, when Nintex is running


Overview:

You have Office Web Apps 2010 installed, Word and PowerPoint viewing does not work, but the editing does.

The appserverhost.exe process is crashing on startup, with error:

System.ServiceModel.EndpointNotFoundException 
"There was no endpoint listening at net.pipe://127.0.0.1/e31bfd4c-5d98-4dc3-8232-5d2601ca814d that could accept the message. This is often caused by an incorrect address or SOAP action...."

 

Cause:

The SharePoint third party workflow product Nintex cause this issue.

 

Workaround:

Stopping all Nintex  Windows services on the SharePoint server that runs the Word Conversion Service.


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