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Office Web Apps: Failing at loading a PowerPoint for Viewing or Editing

Posted By:      Posted Date: December 04, 2010    Points: 0   Category :SharePoint

Greetings all,

As of this morning, we've started to receive reports that users can't load PowerPoint presentations in MS Office Web Apps. In all standard browsers (IE, FFox, Chrome), the load fails with an unexpetected error.

There have been no system changes for several weeks now -- wondering what went wrong? Any ideas of how to fix? Reinstall... er... web apps?!? We're totally baffled, and bummed that such a helpful piece of functionality went ... erm... poof!


p.s. Viewing MS Word Documents still works - thankfully!


Error message: 


Unhandled exception caught when executing web method handler: System.NullReferenceException: Object reference not set to an instance of an object. 
 at Microsoft.Office.Web.Environment.Sharepoint.SharepointServiceLoadBalancer..ctor(OfficeServiceType serviceType, UInt32 refreshIntervalSecs) 
 at Microsoft.Office.Web.Environment.Sharepoint.SharepointServiceInstanceFinderAdapter.GetLoadBalancerForService(OfficeServiceType serviceType) 
 at Microsoft.Office.Server.Powerpoint.Pipe.Web.WacViewServices.BeginGetItem(RequestParams requestParams, String itemId, Stream stream, AsyncCallback callback, Object state) 
 at Microsoft.Office.Server.Powerpoint.Pipe.Interface.ResourceRequest.Begin(AsyncCallback callback, Object state) 
 at Microsoft.Office.Server.Powerpoint.Pipe

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