SAP Message UCF2011 - Exchange rate determination is not specified

Diagnosis
You want to translate a source key figure into a target key figure.However, you have not specified the procedure to be used to determinethe exchange rate.

System Response
Customizing is incomplete. It cannot be saved in this form.

Procedure
Specify a procedure for determining the exchange rate, and well asadditional parameters if necessary (such as the exchange rate type).