TSM sever 5.2.1 on win2k
Oracle 8.1.7.3 on winnt 4 sp6a
rman is running on a different nt4 sp6a machine

TSM for Databases - Oracle 5.2.0 is installed on the rman server with ba client 
5.1.6.0

when running the rman scripts on the rman server I get these errors:

RMAN-03007: retryable error occurred during execution of command: allocate
RMAN-07004: unhandled exception during command execution on channel t1
RMAN-10035: exception raised in RPC: ORA-19554: error allocating device,
device
type: SBT_TAPE, device name:
ORA-19557: device error, device type: SBT_TAPE, device name:
ORA-27000: skgfqsbi: failed to initialize storage subsystem (SBT) layer
ORA-19511: SBT error = 4110, errno = 0, BACKUP_DIR environment variable is
not s
et
RMAN-10031: ORA-19624 occurred during call to
DBMS_BACKUP_RESTORE.DEVICEALLOCATE

Any ideas?????

Thanks.

Steve