Currency Conversion

Hello,

I have a requirement where i need to convert my currency INR to USD. I used the FM ' CONVERT_TO_FOREIGN_CURRENCY'

CALL FUNCTION 'CONVERT_TO_FOREIGN_CURRENCY'

EXPORTING

CLIENT = SY-MANDT

DATE = SY-DATUM

FOREIGN_CURRENCY = USD

LOCAL_AMOUNT = 1000

LOCAL_CURRENCY = INR

RATE = 0

TYPE_OF_RATE = 'M'

READ_TCURR = 'X'

But when i execute the program it says that "Field "USD" is unknown. It is neither in one of the specified tables". How do i rectify this error please help me out.

Can anyone tell me, in which table-field is the currency USD and INR are stored?

Regards,

Abhishek.