The information in this article applies to administrations with the additional module Purchase to pay.
This message indicates that the value of the purchase price is incorrect. Check in KING ERP whether the purchase price has been entered correctly.
Possible solution: if you want to book articles with a negative value, enter the quantity as negative (quantity with a minus sign in front) and keep the purchase price of the article positive. Booking an article with a negative purchase price is not possible in KING ERP.