Message Oracle TNS-04072 - Unable to suspend atleast one of the gateways.

ERRORUnable to suspend atleast one of the gateways.
CAUSECMCTL was unable to suspend one or more gateways. Possible reason could be suspending a gateway that was already suspended or suspending a gateway that was not present.
ACTIONTurn on tracing and logging, retry operation. Information in the log files would help.