SQL 2000 SP4 (2040). W3k SP2. I have one script (SQL ZIP, old backup compression) to backup 2 databases. One start 1PM and run for 10 minutes, the other start 2PM and run for 5 minutes. The script run well for about 4 month. Now, the script finished with errors but the backup is good. After some research I found the problem: there is no more xp_cmdshell in master. So, I recreate xp_cmdshell again. The script finished Ok for 3 or 4 days, after that xp_cmdshell gone again. What could be the reason?