> select <fieldlist>, abs(date1 - date2) as diffdate from aTable
>
> This returns a double which is in days.

Thank you for the hint, but I need it in an stored procedure as in.
Just tried it with 'IBConsole' and it appears to work, but the confusing
part came from 'IBExpert 1.0.068'??? and its stored procedure debugging
tool, which obviously is slightly flawed.

Cheers

Johannes