I think for Radio interface failure, some procedure on radio (e.g. ciphering) failed causing release of the connection.
If an MSC receive a DTAP message releasing the connection or circuit release form the other MSC while waiting for a response to a BSSMAP request sent to RAN, the core will release the connection with reason "Call Control"
Engaom - 12th August 2011 (11:14 GMT)
I'm confused regarding the difference between the two messages
1-BSSMAP CLEAR COMMAND CAUSE:9h (Call Control).