>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)