>All of the checkboxes are bound to logical fields containing .f. in a method called from the init of the form. At the conclusion of the init, 103 of them evaluate to 0 and one to .f. It just isn't "logical" <g>

FWIW, I always check my checkboxes values in code with IF EMPTY(mycheckbox.value), so it does not matter at all what whether it is logical or numeric. (BTW, I do not use NULL values for checkboxes - never had to.)