>Hi,
>
>If i search a NULL on a INDEX with keys not nullable,
>VFP fire a error "Data type mismatch"
>
>

>SET NULL ON
>CREATE CURSOR MyCursor ( A I UNIQUE)
>x=NULL
>SEEK m.x ORDER 1
>

>
>For me, correct is ( like SQL Server ) not found.
>
Fabio,

In VFP and most other languages, NULL = NULL is false. It's because neither side of the expression can be evaluated.