SAP RETAIL 参考PO创建分配表之一
在SAP零售系统里，可以基于分配表来创建采购订单，也可以参考一个采购订单来创建分配表。绕不绕？SAP就是这么灵活！
1，采购订单号：4500000736. 它是使用ME21N创建的。它是一个普通的外购采购订单，如下图示：
ITEM DETAIL里的RETAIL选项卡里ATab-Rel.字段值被设置为1。 如上图。
2，执行事务代码WA01，
系统弹出如下窗口，输入上面的采购订单号，
执行，进入如下界面，
选中item，点击按钮‘Adopt in alloc.tbl’, 进入如下界面，
注意：这里的供应商栏位为空，且不允许输入任何值。系统自动在Distribution Center字段处将工厂NM01的customer code 40填好了，且不允许修改。如上图。
维护好其它数据，保存，
系统报错说：Item category (ZB) not allowed.
3，看该报错信息的F1 帮助文档：
Item 00010: item category (ZB) not allowed.
Message no. MW339
Diagnosis
Item category ZB is not allowed for item 00010. The item has been created referencing another document. This means that the item categories possible are limited.
When an item is created referencing a shipping notification, an item category must be selected that only allows goods to be moved between distribution centers and stores (that is, generation of warehouse orders and deliveries as follow-on documents), and does not allow purchase orders to be generated for external vendors.
System Response
The system does not include reference document items in the allocation table if:
a promotion number is maintained in the reference document item
the reference document item contains a material that is a variant referencing a generic material (higher-level item)
Otherwise the reference document item is adopted in the allocation table. The item category can be changed in the allocation table.
Procedure
Select a valid item category.
4，根据F1帮助文档的说明，SAP 零售系统中如果要参考采购订单来创建分配表（Allocation Table），该采购订单不能是向外部供应商采购的单据，而只能是DC到门店或者门店到门店的补货订单。
