>>>Hi All,
>>>
>>>A strange question perhaps; logical fields in a table start of as blank when browsed. But once set to .T. or .F. you cannot revert the field to a blank. Anyway to do that? Just a curiosity really.
>>
>>Are they actually nulls rather than "blanks"?
>
>One would imagine so but you cannot replace a .null. into a logical field. So ... not sure ?

Sure you can put a null into a logical field as long as it is defined to accept nulls

create cursor xxx ( xxx L null )
insert into xxx values(null)

browse


or
create cursor xxx ( xxx L null default null)
append blank
browse