SAP Message WP034 - Enter billing category W in billing type &

Diagnosis
Billing type &V1& is set in Customizing for POS inbound processing.Billing category "W" is to be selected as the billing type for billingdocuments that were created using POS inbound.

System Response
The IDoc billing documents were created with billing category "W".

Procedure
Change the billing category for Customizing inbilling type. After this, the IDocs areprocessed by the system without a prior warning message.
INCLUDE ISR_CUSTOMIZING OBJECT DOKU ID TX