Simple question about loading routine

Hello Gurus,
I will use following routine:
my source includes fields "CURRENCY" , "AMOUNT".
following routine is for target field "0AMOUNT" in DSO.
but when I check this routine, get "The data object "SOURCE_FIELDS" does not have a component called "CURRENCY", why ? how to correct it ?
IF SOURCE_FIELDS-CURRENCY IS INITIAL.
RESULT = 0.
CURRENCY = 'EUR'.
ELSE.
CALL FUNCTION
'CONVERT_TO_LOCAL_CURRENCY'
EXPORTING
DATE = sy-date
FOREIGN_AMOUNT =
SOURCE_FIELDS-amount
FOREIGN_CURRENCY =
SOURCE_FIELDS-currency
LOCAL_CURRENCY = 'EUR'
TYPE_OF_RATE = 'M'
IMPORTING
LOCAL_AMOUNT = RESULT
EXCEPTIONS
OTHERS = 1.
IF sy-subrc = 0.
CURRENCY = 'EUR'.
ELSE.
RESULT = SOURCE_FIELDS-amount.
CURRENCY = SOURCE_FIELDS-currency.
ENDIF.
Many thanks,
Frank Zhang

Hi Frank,
(1) for 'CONVERT_TO_LOCAL_CURRENCY' function, importing and exporting are different from function definition. but if I reverse them, it doen not work, why?
I don't know the reason if this is what is happening
(2) "LOCAL_AMOUNT = RESULT", means put result of function to LOCAL_AMOUNT, or something else?
I think, Local amount ie amount after conversion to EUR will be put in result.
(3) if I need another statement in the routine to " RESULT = ? ", please complete this question mark for me ? No you would not need another statement.
(4) can I set value for another target object such as 0CURRENCY in this routine for 0AMOUNT.
I think, you could but you may need to use return table for such a case.
Regards,
Sunmit.

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