In the screen "Assign Formula"I have a calculation like e.g.:

CASE ([ShippingPort])
WHEN "New York" THEN "1000"
etc
etc
END

The "auto calculated formula" is always checked,cannot switch it off.Why?
others like "update all cont/clear target/protect" all UNchecked.

I get error:
INCORRECT SYNTAX NEAR THE WORD CASE.

This only when filling in the field "Shipping Port"

If I do a fresh cut and paste of the assign formula then NO ERROR.

I seems that during working, the formula is piling up with concanating the same formula
twice,so after "END", I see the same formula again,each time i fill in a Shipping Port.
Anybody helping me ??