Between the time you search for the key and then write the key, another user *can* have written the key in the intervening time.

>Why will it fail in multi-user environment?

>>If yo don't want to use buffering (IMO it would behoove you to spend the learning about it as soon as possible) then you could use an unbound textbox control so you have a change to look up the key.
>>
>>Be aware, though, this will fail in multi-user environments.
>>