Paul,
Another one to watch for is buffering
Here is one that i used recently - it works.

use suppliers exclusive
cursorsetprop("Buffering" ,1)
if type('suppliers.volumeB') = 'U'
	alter table suppliers add column volumeB C(1) default 'N'
endif

regards
>Thanks Alex,
>
>That was what I was thinking.
>
>Paul