Oracle RMAN Backup Fails with error code ORA-27211 (4044331)

Date: 3/2006
Effected NV Version: All
OS Version: Linux/Unix
Plugin version: 4.5
Application version:

Description:
Oracle RMAN Backup Fails with error code ORA-27211

Symptoms:
The log for a backup job contains the following errors-

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of allocate command on c1 channel at 04/06/2006 16:01:19
ORA-19554: error allocating device, device type: SBT_TAPE, device name:
ORA-27211: Failed to load Media Management Library

Cause:
Linking of the Media Management Library has not been completed, or the links were incorrectly configured.