Every so often one of the NT machines logs this when its backup fails. The problem occurs only occasionally but I would like to know what is causing it. This particular machine is using NT4SP5 TSM3.73 client backing up to an RS6k TSM4.1 level 0. Here is the output from the dsmerror.log 01/02/2001 00:55:14 ANS1087E Access to the specified file or directory is denied 01/02/2001 09:48:35 ConsoleEventHandler(): Caught Logoff console event . 01/02/2001 09:48:35 ConsoleEventHandler(): Process Detached. 01/02/2001 09:48:36 ConsoleEventHandler(): Caught Logoff console event . 01/02/2001 09:48:36 ConsoleEventHandler(): Process Detached. 01/02/2001 19:00:32 ANS1074I *** User Abort *** 01/02/2001 19:00:32 ANS1512E Scheduled event 'DAILY-NT-INCREMENTAL' failed. Return code = 4. I find very little documentation on explanation of return codes Thanks for any input Jack