How To Fix O3190 - UoM group cannot be changed because of stock posted

SAP Error Message - Details

• Message type: E = Error

• Message class: O3 - IS-Oil: HPM messages (goods movements, QCI, deliveries)

• Message number: 190

• Message text: UoM group cannot be changed because of stock posted

What causes this issue?

You attempted to change the unit of measure group for the material, but
that is not allowed once stock has been posted to the material at any
of the plants.

System Response

The system will change the unit of measure group back to the original
value.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message O3190 - UoM group cannot be changed because of stock posted ?

  The SAP error message O3190 indicates that a Unit of Measure (UoM) group cannot be changed because there is stock that has already been posted against that UoM group. This typically occurs when you attempt to change the UoM group for a material that has existing stock in the system, which can lead to inconsistencies in inventory management and reporting.
  Cause:
  
  Existing Stock: The primary cause of this error is that there are stock quantities recorded in the system for the material in question, and changing the UoM group would affect how that stock is managed and reported.
  Open Transactions: There may be open purchase orders, sales orders, or other transactions that reference the material with the current UoM group.
  Material Master Data: The material master data is linked to the UoM group, and changing it while stock exists can lead to data integrity issues.
  
  Solution:
  To resolve this error, you can consider the following steps:
  
  
  Check Stock Levels: Verify if there is any stock available for the material. You can do this by using transaction codes like MMBE (Stock Overview) to see the stock situation.
  
  
  Clear Stock: If possible, you may need to clear the stock before changing the UoM group. This can be done by:
  
  Performing a stock transfer to another material or location.
  Consuming the stock through production or sales.
  Adjusting the stock to zero using a stock adjustment transaction (e.g., MB1A for goods issue).
  
  
  
  Review Open Transactions: Check for any open purchase orders, sales orders, or other transactions that might be referencing the material. You can use transaction codes like ME2L (Purchase Orders by Vendor) or VA05 (List of Sales Orders) to identify these transactions.
  
  
  Change UoM Group: Once the stock is cleared and there are no open transactions, you can proceed to change the UoM group in the material master using transaction code MM02.
  
  
  Consult Documentation: If you are unsure about the implications of changing the UoM group, consult your organization's documentation or SAP help resources for guidance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM02 (Change Material), MMBE (Stock Overview), MB1A (Goods Issue), and ME2L (Purchase Orders by Vendor).
  Material Master Data: Understand the structure of the material master data and how UoM groups are defined and used within your organization.
  SAP Notes: Check SAP Notes for any specific guidance or updates related to this error message, as there may be patches or updates that address similar issues.
  
  By following these steps, you should be able to resolve the O3190 error and successfully change the UoM group for the material in question.