How To Fix CMM_MM018 - Goods receipt quantity in purchase order history &1 &2 is negative

CMM_MM018 - Overview

• Message type: E = Error

• Message class: CMM_MM -

• Message number: 018

• Message text: Goods receipt quantity in purchase order history &1 &2 is negative

What causes this issue?

The report has selected purchase order &V1&, item &V2&. The goods
receipt quantity in the purchase order history for the valuation key
date &V3& is negative. This is not allowed.

How can this happen?

Example for a negative GR quantity in purchase order history for the
valuation key date 20130114:
<ZH>Goods Receipt,,Quantity,,Posting Date</>
12345,,4 units,,20130114
12346,,6 units,,20130115
12347,,6- units,,20130112
In this example, a goods receipt quantity of -2 units results for the
valuation key date 2013.01.14, because the negative 6 units (posted at
2013.01.12) are compensated with only 4 units (posted at 2013.01.14).
The goods receipt 12346 is posted afterwards and therefore the system
ignores it for the valuation key date 2013.01.14.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Check the purchase order history for purchase order &V1&, item &V2&.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

CMM_MM018 - Details

• The SAP error message CMM_MM018 indicates that there is a negative goods receipt quantity in the purchase order history for a specific purchase order item. This typically occurs when there is an inconsistency in the inventory management or when the system attempts to process a goods receipt that would result in a negative stock level.
  
  Cause:
  
  Negative Stock: The most common cause is that the system is trying to post a goods receipt that would result in a negative stock level for the material.
  Incorrect Quantity: The quantity being received may be less than the quantity already posted as received, leading to a negative balance.
  Data Entry Errors: Manual entry errors during the goods receipt process can lead to discrepancies in the quantities.
  Cancellation of Goods Movements: If a previous goods movement (like a goods issue or a return) was canceled, it might lead to inconsistencies in the stock levels.
  Purchase Order Changes: Changes made to