Error "SLS Error: XML returned from Engine was invalid." displays when restore database and forcing restore over the top of an existing database
or the following message may appear if restore started from Query Analyzer:
Error: Server: Msg 62309, Level 19, State 1, Line 1
SQL Server has returned a failure message to LiteSpeed 2005 which has prevented the operation from succeeding.
The following message is not a LiteSpeed 2005 message. Please refer to SQL Server books online or Microsoft technical support for a solution:
RESTORE DATABASE is terminating abnormally.
Exclusive access could not be obtained because the database is in use.
Users were still logging onto the database.
Kill all the user's sessions who are accessing the database. Restart restoring database, using the parameter @with = 'REPLACE'
For more information on restoring database, please refer to the Microsoft KB: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/tsqlref/ts_ra-rz_25rm.asp