1881841 - Error Message:Sales Order Item is Disabled for Posting; Item is Completed.

You are unable to add attachments or make any changes like accept deviation or Change price or quantity and click on send update or approve

a purchase order created with account assignment as Sales Order.

SAP Business ByDesign

1. Go to Purchase Requests and Orders work center.
2. Select Purchase Orders view.
3. Select Purchase Order XXX (XXX stands for the purchase order ID).
4. Click Edit.
5. When you try to attach the documents in the purchase order and save the document 

6. or When you try to accept deviation

7. or Change price or quantity and click on send update

   System displays this error when you do any changes in the purchase order.

 or

When approvals are involved the approver cannot approve due to this error.

Cause  the  preceding document sales order/ service order is in completed status ,financials cannot process the new modifications.

Create new sales order for the  changes , request SAP  via incident to withdraw the Purchase order from approval if the approvals are involved and finally add the new sales order in the Purchase order and click on send update.

Unable to accept deviation, cannot add attachments , KBA , AP-POP-PO , Purchase Order , AP-SLO , Sales Order Processing , How To