>>>Hello UT,
>>>
>>>select * from ster where SubStr(sunum,1,1) = "E" .AND. eclrhse == .F.
>>>
>>>returns cursor containing "unknown" or "unmarked" records as well.
>>>(logical not known yet)
>>>How may I return only records containing marked-logical-False?
>>
>>Try:

>>SELECT *;
>>  FROM Ster;
>>  WHERE LEFT(sunnum, 1) = "E" AND;
>>    NOT eclrhse AND NOT ISBLANK(eclrhse)

>
>I don't know what I was thinking when I suggested empty(). But isblank() should work (but it does not).
>
>For example, if I go to an individual record and say:
>
>? isblank(lField)
>
>I get the expected result. If I put it in a query, I get unexpected results.

Same here, but creating an index using the ISBLANK() function should return the expected results.