Just a shot --

Have you checked out the NVL() function? It takes 2 parameters. If the 1st is non-null, it is returned. If the 1st is null, the 2nd is returned (whether or not it is null)

You could use it as follows:

NVL (APossiblyNullValue, TheValueYouWantReturnedIfNull)
specifically:
NVL (lOK, .F.)

Jay "Dutch Power" van Santen