Diagnosis
When you select the average valuation type, the wage type can onlyaccept Unity/quantity in its possible entry combinations (wage typeproperties).

System Response
An error message appears on the selection screen.

Procedure
Check that the wage type you want to use for Annual bonus (averages) isconfigured correctly in its entry combination in the wage type propertytable and change the Unity/quantity value in the entry combination topositive, leaving the amount field negative.