3783704 - Error "Combination of expenses and mileage rates is not allowed" when posting an Expense report .

When posting an expense report below error occurs:

Error: "Combination of expenses and mileage rates is not allowed"

XXXX - Represents country/region

SAP Business ByDesign

expense report, italy, travel and expenses, combination of expenses and mileage rates is not allowed, no calculation of settlement results due to inconsistent entries, mileage, parking, expense type, expense category, rental car, private car expenses, configuration, statutory rates, reimbursement , KBA , AP-ERM , Expense and Reimbursement Management , Problem