Change the base unit of measure（更改度量單位）

根據SAP的提示資訊，更改度量單位需要滿足：1、該物料沒有當期和前期庫存；2、不存在該物料的採購申請、採購訂單、計劃協議。然而事實上遠沒有這麼簡單。

根據SAP Note: 138767，更改物料度量單位時，系統會進行以下檢測：

The base unit must not be defined as an alternative unit of measure for the material
No International Article Number must be assigned to the base unit
No proportion/product units must be defined for the material
No configurable material must be assigned
The material must not be used as a configurable material
Stock must neither exist for the previous period nor for the current period
No physical inventory must be active
No reservations or dependent requirements must exist for which the deletion indicator is not set
No planned orders must exist
No purchase requisitions, purchase orders or scheduling agreements must exist for which the deletion indicator is not set
No WM transfer requirements, no WM quants or no WM posting change notices must exist
The material must not be a bill of material
The material must not be contained in a bill of material
The material must not be used as a production resource/tool
The material must not be used in task lists
No standard cost estimate must exist for the current or future period
No production orders must exist
No planned independent requirements must exist
No run schedule headers must exist
If the base unit has dimensions, no serial number profile must be assigned
No sales and distribution documents must exist which have status Not processed or Partially processed.

如果存在前期庫存，根據SAP Note: 30656的提示，需：

1. Post the same amount to current period stock (for example, using movement type 561) so that previous period stock and current period stock are identical.
2. Make a withdrawal posting in the previous period for the stock together with posting date (for example, using movement type 562).

這是 SAPFans 給的一個詳細步驟（帶批次管理）：

1. wait until last day of the period
2. post GI using 201 (but I not sure why SAP says used 561)
3. period close and open new period
4. uncheck the Batch Management indicator in material
5. reverse the GI with 202
6. delete and archive

 來源:http://www.mexp.net/wordpress/?p=51