I'm building a custom re-login system.

The idea is where are working in a Hospital. Users can use differents computers and switch locations very often, but they don't want to open FMP7 or the database everytime. And also there are several levels of privileges : doctors, nurses, etc (Some can see everyting, some others NO).

So I made a kind of loop to a custom login layout

I believe if you just block the db on exit, it will leave the user logged in. If you are tracking sessions, that could cause a second session to open, if they have not actually been logged off on another machine.

I would be inclined to create a control account with very limited access. As part of your logout script, re-login to this account and bring up a layout with a login button. Hit the button to start relogin script for the new user. This should gaurantee that a user completely logs out of the system, and the db will still stay out on the machine.

Hope this helps.