On my instance of SharePoint 2010 that has multiple tenanted site collections, I have installed Office Web Apps. After having a few issues with the initial setup, I have the service applications setup and running, and I am able to open and edit Powerpoint and Excel files.
However, when I attempt to Open (For Viewing) Word files, I get an error: " Word Web App cannot open this document for viewing because of an unexpected error. To view this document, open it in Microsoft Word. Error Id: ".
After opening the ULS logs, I have found that the underlying error message looks like the below:
04/16/2013 09:34:45.20 ... Office Web Apps Office Viewing Architecture 30gr Unexpected Unexpected exception in UnifiedCache.BeginRead System.ArgumentException: List 'cache' does not exist at site with URL '
http://rootsite'. at Microsoft.SharePoint.SPListCollection.GetListByName(String strListName, Boolean bThrowException) at Microsoft.Office.Web.Environment.Sharepoint.WacSharepointCacheOM.GetCacheDocLib(SPSite site) at Microsoft.Office.Web.Environment.Sharepoint.WacSharepointCacheOM.GetCachedItem(SPSite site, Guid documentSiteId, String versionRep, Guid variation)
http://rootsite is the core url of the tenanted web application. I believe the error stems from the fact that, at the time of configuring Office Web Apps, there was no Site Collection created for that URL. (As it is a tenanted configuration, I understand it is best practice to leave it this way, but correct me if I am wrong)
I will stress that I can Edit all document types (Word, Excel and PowerPoint), however I cannot open Word documents for reading. I have ensured that the Service Applications are setup and running correctly. I have also ensured that the OfficeWebApps Cache is configured correctly. The Temp directory locations at
C:\Windows\Temp\waccache both exist on the server.
Does anybody know of a way to fix this error?