SAP Message UCF2012 - Currency translation key is not specified

Diagnosis
You want to translate a source key figure into a target key figure.However, you have not specified a currency translation key for thespecific translation.
The currency translation key is formed by the translation timeframe, thetranslation rule, and the exchange rate period used.

System Response
Customizing is incomplete, and therefore cannot be saved.

Procedure
Choose one of the available currency translation keys.
Note: By using new combinations of the translation timeframe,translation rule and E/R period used, you can define more currencytranslation keys - for example, for translation with the prior-yearexchange rate.