SSAS Tabular : OLE DB or ODBC error : The Microsoft Access database engine cannot open or write to the file. It is already opened exclusively by another user, or you need permission to view and write it's data.; 3051.

Hi all, i'm trying to import a spreadsheet into a tabular model and getting this stupid error even though the impersonation account i'm using is an admin account with full access to the file.  ANY IDEAS? I hate these stupid permission related issues!!! Thanks for your help.