22 answers
As far as I know, because $Given filed is on individual Campaign Member page, and the member is a Contact. Campaign Member and Opportunity is a many-to-many relationship, so I can't pull out the $Given field directly from Opportunity. That's why I would like to copy the current value of the $Given field and use it to add a new value to it. Is there any formula that I can copy the current value? Or maybe I can use the prior value? But if I write Priorvalue(), it returns a wrong message: "The formula expression is invalid: Incorrect number of parameters for function 'priorvalue()'. Expected 1, received 0."
