Thanks to all who responded. Meanwhile I found the cause for for my problem.
As so often it was at a completely different place.
in isc_interprete() ISC_STATUS is referenced by **status_vector. This
is the only
call where it is like this. Programming in C this would not have
happened, in Pascal
it is more confusing. It takes its time until you have figured out how
it works.
Indeed NIL is valid for INSERT. I checked that out.

Dieter

Dimitry Sibiryakov schrieb:

> On 5 Sep 2002 at 20:58, Dieter Raith wrote:
>
> >Maybe someone experienced can tell me, if NIL is valid for a XSQLDA
> >pointer. Otherwise I have to supply the structure and point to it.
>
> Nil is valid if your SQL statement doesn't return any data.
> (INSERT, UPDATE, EXECUTE PROCEDURE w/o returning values, DDL and so on)
> Otherwise you have to supply a pointer to a valid, half-filled
> XSQLDA structure.
>
> SY, Dimitry Sibiryakov.
>
>
>
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