Getting calculated fields value in NAV

Hi there

I get a record of type VendorLedgerEntry this way:

VendorLedgerEntry.GET(2278);

The Record has a column "Amount" of type FlowField and has a CalcFormula like SUM(.....)

The retrieved Record assigned to VendorLedgerEntry variable has no Value in the column "Amount", the return value es '0'

Can I execute the CalcFormula after obtain the Record? or... Can I obtain the record with the field filled with the calculation result value?

Thanks everyone!

Pablo from Paraguay