Diagnosis
The Customizing settings (IMG) for pricing element 04 (net price) definethat this pricing element is identified in the pricing procedure using acondition subtotal. The list price should refer to the subtotal withsubtotal field S. You make this setting in the following activity:Identify Predefined Pricing Elements in Pricing.
You therefore cannot use this pricing element for simplified pricemaintenance in sales documents.

System Response

Procedure
You can only use the pricing element 04 (net price) for simplified pricemaintenance in sales documents with a different configuration option.