Diagnosis
As program VLCUSTXPRA was running, a sales document category was set inthe item categories of the delivery (table TVLP). This value was takenfrom delivery item category determination (table T184L). If the itemcategory is only used for outbound deliveries, the program assigns itthe value 'J' (outbound delivery). If you have only used this itemcategory for inbound deliveries up to this point, it is assigned thevalue '7' (inbound delivery). You have encountered a situation in whichyou are using one item category for both inbound and outbounddeliveries, which makes it impossible for the system to determine aunique value. From release 4.0C onward, the sales document categorytakes on a controlling function over the delivery item category and theitem category can only be used for inbound or outbound deliveries, butnot for both.

Procedure
Decide whether you would like to use the item category for inbounddeliveries (= '7') or outbound deliveries (= 'J') and maintain thecorresponding value in table TVLP (delivery item categories).Otherwise, create a new item category in Customizing under shipping andinclude the corresponding subsequent activities.