>My experience is that a lock on arecord will be released during a crash. My supervisor does not believe me. Can you please direct me to literature on the subject so that I have some proof on the subject...

What kind of crash are you talking about?

IAC, you can try it. Lock a record manually. From another workstation, try to write to the record. You'll see that it is not working. Pull the plug on the server. Restart the server. Try to write to the record. It should work. Of course, I am expecting you are trying that on a test server. lol