Hello Marco

> you should first check if field is null
> if ( (Field <> nil) and (Field.FieldName = 'myField') ) then ....
>
> Regards
> Marco

your are right! But testing with "and" leads to an Access violation
when testing the second condition. The following code do what I like
to do :

If Field=nil then exit;

If Field.FieldName='myField' then...

Thanks for your help.

Best - Ulrich