Hi Gary,
If you try to save a Credit Note in which the Quantity or Sum in a row is too high, the message "Too high quantity" or "Too high Amount" (as appropriate) will appear.
The "Too high quantity" message will also appear when the Cred. Row field is empty
(i.e. when the Credit Note will update stock and when you have not connected a row to a row in the Invoice being credited).
Best regards,
HansaWorld Support