When I have to leave a window that is for a session in a production system (either database or OS), I'll type "production" at the command line. If I accidentally paste something back into that window, it will cause a syntax error. Yes, I have the prompt (sqlplus or OS) changed as well, but there are times when you can come back to the wrong window, get careless or "rammy", etc. It's just an extra precaution that I take. I learned this lesson when I was setting up a standby database. Other precautions: - Rename a file or directory before deleting it. Leave it in place (renamed) for a day or two if possible. - When I need to delete a datafile, I like to force a checkpoint then check the timestamp on that datafile. Jay **DISCLAIMER This e-mail message and any files transmitted with it are intended for the use of the individual or entity to which they are addressed and may contain information that is privileged, proprietary and confidential. If you are not the intended recipient, you may not use, copy or disclose to anyone the message or any information contained in the message. If you have received this communication in error, please notify the sender and delete this e-mail message. The contents do not represent the opinion of D&E except to the extent that it relates to their official business.