I get the following errors trying to restore Oracle 8.0.6

RMAN-08021: channel c1: restoring controlfile
RMAN-08505: output filename=/test_oracle_home/oradata/MXIP/control01.ctl
RMAN-03026: error recovery releasing channel resources
RMAN-08031: released channel: c1
RMAN-00569: ================error message stack follows================
RMAN-03002: failure during compilation of command
RMAN-03013: command type: restore
RMAN-03007: retryable error occurred during execution of command: IRESTORE
RMAN-07004: unhandled exception during command execution on channel c1
RMAN-10035: exception raised in RPC: ORA-19624: operation failed, retry
possible
ORA-19507: failed to retrieve sequential file,
handle="cfMXIP_t422396353_s1676_p
1", parms=""
ORA-27007: failed to open file
SVR4 Error: 17166272: Unknown system error
Additional information: 7009
Additional information: 2
ORA-06512: at "SYS.X$DBMS_BACKUP_RESTORE", line 925
RMAN-10031: ORA-19624 occurred during call to
DBMS_BACKUP_RESTORE.RESTOREBACKUPP
IECE

>From the netbackup  I am getting CODE 227
Eustace Fernandes
efernandes AT talisman-energy DOT com