Message Oracle RMAN-10024 - error setting up for rpc polling

ERRORerror setting up for rpc polling
CAUSEThe Recovery Manager could not create the RPC polling context which is required to test for RPC completion. This message should be accompanied by other error message(s) indicating the cause of the error.
ACTIONIf other error messages indicate a condition that can be corrected, do so, otherwise contact Oracle.