How To Fix MW478 - A negative stock was determined for & &

MW478 - Overview

• Message type: E = Error

• Message class: MW - Messages IS-R / Allocation Tables

• Message number: 478

• Message text: A negative stock was determined for & &

What causes this issue?

A negative stock was determined for a plant in table MARD.
This leads to errors when determining the quantity in the context of an
allocation strategy that depends on the current stock in the plant.

System Response

The strategy has continued the quantity determination for this plant
with an assumed stock of 0.

How to fix this error?

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

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

MW478 - Details

• The SAP error message MW478 indicates that a negative stock situation has been detected for a specific material in a particular plant/storage location. This typically occurs when the system attempts to process a transaction that would result in a stock level going below zero, which is not allowed in standard inventory management practices.
  
  Cause:
  
  Incorrect Stock Levels: The stock levels in the system may not be updated correctly due to previous transactions that were not posted properly.
  Goods Movement Errors: There may have been goods movements (like goods issues or transfers) that were posted without sufficient stock on hand.
  Inventory Management Issues: Issues during inventory counts or adjustments that did not reflect the actual stock levels.
  
  Configuration Issues: The system may be configured in a way that does not allow for negative stock, or there may be settings that need to be adjusted.
  
  
  Solution:
  
  Check Stock Levels: Use transaction codes like MMBE (Stock Overview) to check the