How To Fix MPE_OAN183 - Unit of measure for reference material &1 plant &2 missing in OA &3

SAP Error Message - Details

• Message type: E = Error

• Message class: MPE_OAN - Operation Activity Network Messages

• Message number: 183

• Message text: Unit of measure for reference material &1 plant &2 missing in OA &3

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message MPE_OAN183 - Unit of measure for reference material &1 plant &2 missing in OA &3 ?

  The SAP error message MPE_OAN183 indicates that there is a missing unit of measure for a reference material in a specific plant within the context of an Operational Area (OA). This error typically arises in the context of materials management or inventory management processes in SAP.
  Cause:
  
  Missing Unit of Measure: The primary cause of this error is that the unit of measure (UoM) for the specified reference material (material number &1) in the specified plant (plant code &2) is not defined in the system.
  Configuration Issues: There may be issues with the configuration of the material master data, particularly in the area of units of measure.
  Data Inconsistencies: There could be inconsistencies or missing data in the material master records, especially if the material has been recently created or modified.
  
  Solution:
  
  
  Check Material Master Data:
  
  Go to the Material Master (transaction code MM03) and enter the material number &1.
  Check the "Basic Data" and "Purchasing" views to ensure that the unit of measure is defined for the specified plant &2.
  If the unit of measure is missing, you will need to add it.
  
  
  
  Define Unit of Measure:
  
  If the unit of measure is not defined, you can add it by using transaction code MM02 (Change Material) and navigating to the relevant views to enter the missing UoM.
  Ensure that the UoM is consistent with the other related data (e.g., purchasing, sales, and inventory management).
  
  
  
  Check Configuration:
  
  If you have the necessary authorizations, check the configuration settings for units of measure in the customizing settings (transaction code SPRO).
  Ensure that the UoM is correctly set up in the system and that it is assigned to the relevant material types.
  
  
  
  Consult Documentation:
  
  Review any relevant documentation or guidelines provided by your organization regarding material master data management to ensure compliance with internal processes.
  
  
  
  Testing:
  
  After making the necessary changes, perform a test transaction to ensure that the error no longer occurs.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  MM03: Display Material Master
  MM02: Change Material Master
  SPRO: Customizing Implementation Guide
  
  
  Material Master Views: Ensure that you are familiar with the different views of the material master, such as Basic Data, Purchasing, and Sales views, as they may contain relevant information regarding units of measure.
  SAP Notes: Check for any SAP Notes related to this error message for additional guidance or patches that may address the issue.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in materials management.