Yes, there is some trouble with it, IMHO. I'm afraid this constraint isn't implemented yet.
I've investigated that lib/db.l contains class +Need that has the only method mis> that shows in some way (don't know yet how) 'Input required'. Many other classes have the same method, so it seems to be some way of validating. Unfortunately, neither source nor docs have any comments on this. Maybe the Author can explain. -- UNSUBSCRIBE: mailto:[EMAIL PROTECTED]