OnObjectExit trigger that returns user to field if empty?

[HALBURN]

I am trying to use an OnObjectExit script trigger to validate if a field is empty. If the field is empty I want to show a custom dialog message and then send the user back to the field if they choose LastMessageChoice 1.
 
I have create the following script but it's not working:

 

 

If I execute the script from the Scripts menu it works. But if I execute it with the OnObjectExit trigger it displays the custom dialog message but it's not sending the user back to the field.

[comment]

it displays the custom dialog message but it's not sending the user back to the field.

 

Actually, it does (or perhaps it doesn't, since all this is happening before the triggering event has been processed). Anyway, the problem is with what happens after the script has exited - see:

http://fmforums.com/forum/topic/92113-whats-the-worth-of-«go-to-field-»/?p=422996