xlog dir problem

While using 7.1.2 I get the following error, any idea what this
is?

FATAL 2: MoveOfflineLogs: cannot read xlog dir: No such file or directory
Server process (pid 14656) exited with status 512 at Wed Nov 13 14:07:17
2002
Terminating any active server processes...
Server processes were terminated at Wed Nov 13 14:07:17 2002
Reinitializing shared memory and semaphores
DEBUG: database system was interrupted at 2002-11-13 14:07:17 MST
DEBUG: CheckPoint record at (0, 21308560)
DEBUG: Redo record at (0, 21308560); Undo record at (0, 0); Shutdown
FALSE
DEBUG: NextTransactionId: 16036; NextOid: 91042
DEBUG: database system was not properly shut down; automatic recovery in
progress...
DEBUG: ReadRecord: record with zero len at (0, 21308624)
DEBUG: redo is not required
FATAL 2: MoveOfflineLogs: cannot read xlog dir: No such file or directory
/usr/local/pgsql/bin/postmaster: Startup proc 14663 exited with status 512
- abort

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