Purchase Order Charges Per Unit Not Allowed

I am trying to apply Charges to a purchase order and I have selected the “Charge Code” and selected the catagory “Pcs.” and when I do I get the following Message: “Charges per unit are not allowed”. Does anyone know why this occurs?

Are you applying the charge code at header level rather than line level?

I tried the Header Level and the Line Level. Neither Work.

There should not be any issue when the same is applied from the lines

I agree the line level application is the only one where a charge based on units can be made.