thanks, Dave, for this usefull link.

--- In firebird-support@yahoogroups.com, "David Richmond"
<firebirdfaq@...> wrote:

>
> --- mohamed.banaouas wrote:
> > "The cursor identified in the update or delete statement is not
> > positioned on a row. no current record for fetch operation."
>
> http://www.firebirdfaq.org/faq144/
>
> HTH,
> Dave
>