Currency conversion

Hi experts,

I 'm trying to create a currency conversion function in order to save data from a ratio 0AMOUNT to another AMOUNTUSD that I added into the same Infocube.

When I create the predefined planning function in tx RSPLAN the field to complete the value of exchange rate type doesn't give me any value to choose.

I can easily found the 0AMOUNT and the AMOUNTUSD in destiny ratio field but no value where I should have the exchange rate type.

Thanks,

Diego