Error Mounting New Database

When trying to mount a newly created Exchange 2010 database I received an error that said:

Failed to mount database ‘DB03’.

Error:
Couldn’t mount the database that you specified. Specified database: DB03; Error code: An Active Manager operation failed. Error: The database action failed. Error: Operation failed with message: MapiExceptionNotFound: Unable to mount database. (hr=0x8004010f, ec=-2147221233)
. [Database: DB03, Server: EX1.domain.com].

An Active Manager operation failed. Error: The database action failed. Error: Operation failed with message: MapiExceptionNotFound: Unable to mount database. (hr=0x8004010f, ec=-2147221233)
. [Database: DB03, Server: EX1.domain.com]

An Active Manager operation failed. Error: Operation failed with message: MapiExceptionNotFound: Unable to mount database. (hr=0x8004010f, ec=-2147221233)
. [Server: EX1.domain..com]

MapiExceptionNotFound: Unable to mount database. (hr=0x8004010f, ec=-2147221233)

The quickfix…close EMC & wait a few minutes. Then open EMC & mount it again.