Please I need someone to tell me how to rectify these errors during my cube processing. 1. OLE DB error: OLE DB or ODBC error: login failed for user 'NT AUTHORITYNETWORK SERVICE.; 28000; cannot open database "AdventureWorksDW2008R2" requested by the login. The login failed. 2. Errors in the high-level relational engine. A connection could not be made to the Data source with the Data source ID of 'AdventureWorksDW2008R2', Name of 'AdventureWorksDW2008R2'. 3. Errors in the OLAP storage engine: An error occured while the dimension with the ID of 'Dim Date', Name of 'Dim Date' was being processed. 4.Errors in the OLAP storage engine: An error occured while the 'Date key' attribute of the 'Dim Date' dimension from the 'SSAS Project' database was being processed. 5. Internal error: The operation terminated unsuccessfully. 6. Server: The operation has been cancelled.