> Create cursor (lcTemp) (..........)
>
> USE DBF(lcTemp) again in 0 alias (This.cSub)

> There is no need to do this. Cursors created with CREATE CURSOR are editable.

Thank you for your kind advice and I confused 'changing read-only
cursor into editable one' with 'creating cursor'. Owing to you,
I made my code shorten..^^ and found why the result sets by sql couldn't
come from cursor was that I set table buffering to cursor...^^;;
I glanced at similar kind of question before in UT, but I failed to search.
i hope someone advise me again why the table buffered cursor couldn't be
queried by sql. Thank you for all kind of Advise.