Mei - it appears to me that you are trying to restore backup on Analysis Services server that is installed as MOLAP server and not as "SharePoint integrated mode" (or "PowerPivot for SharePoint") server. You cannot do that. You are able to restore PowerPivot internal backup just to SSAS server that was installed in SharePoint integrated mode. For SSAS server DemploymentMode parameter is set in file "c:\Program Files\Microsoft SQL Server\MSAS10_50.PowerPivot\OLAP\Config\msmdsrv.ini" (default location)

 

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