Hi AGRI
When you import transactions into a general journal you will normally only use the amount field and run validate on that filed. The validate will populate the amount LCY field.
But if you import transactions in a foreign currency and you are provided with both the amount in currency and the amount in LCY, then you will have to use the currency code field, the amount field with the currency amount and the LCY amount field. And make sure to validate them in that order.
Hope this helps you further.