I don’t know why but suddenly I started facing this error while I was trying to create new document or edit existing document in the SharePoint document library. was using Office 2010 and SharePoint 2010.
Error Message was: - Error while accessing office document cache.
A quick search on the dear friend google given some idea I don’t remember what was the source of this post and that’s why thought to share.
Open task manager and take a look at processes tab. Try to find the process with name MSOSYNC.exe
And end the process. Now try to create / open documents from SharePoint document library and I hope this error will not be there anymore.
Note: I didn’t search for where else this process is used for, so not sure what effects this can have in your environment but worked fine for me for above error.
More Information about MSOSYNC.exe and other way to delete cached files here.