How To Fix MPE_OAN088 - Unit of measure for component assignment missing in OA &1, version &2

SAP Error Message - Details

• Message type: E = Error

• Message class: MPE_OAN - Operation Activity Network Messages

• Message number: 088

• Message text: Unit of measure for component assignment missing in OA &1, version &2

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_OAN088 - Unit of measure for component assignment missing in OA &1, version &2 ?

  The SAP error message MPE_OAN088 indicates that there is a missing unit of measure (UoM) for a component assignment in the context of an Order Assignment (OA). This error typically arises in the context of production orders, maintenance orders, or similar processes where components are assigned to a task or order.
  Cause:
  
  
  Missing Unit of Measure: The primary cause of this error is that the system cannot find a unit of measure for a specific component that is being assigned to an order. This can happen if:
  
  The material master for the component does not have a defined unit of measure.
  The unit of measure is not maintained in the relevant configuration settings.
  The component is not properly defined in the bill of materials (BOM) or routing.
  
  
  
  Data Inconsistencies: There may be inconsistencies in the data, such as missing or incorrect entries in the material master or BOM.
  
  
  Versioning Issues: The error message includes a version number, which may indicate that the issue is related to a specific version of the order or component.
  
  
  Solution:
  
  
  Check Material Master:
  
  Go to the material master record for the component in question (transaction code MM03).
  Ensure that the unit of measure is defined in the "Basic Data" and "Purchasing" views.
  
  
  
  Review BOM and Routing:
  
  Check the bill of materials (BOM) for the component to ensure that it is correctly defined and that the unit of measure is specified.
  If applicable, review the routing to ensure that the component is correctly assigned.
  
  
  
  Maintain Unit of Measure:
  
  If the unit of measure is missing, you can add it by using transaction code MM02 to edit the material master and include the necessary unit of measure.
  
  
  
  Check Configuration Settings:
  
  Ensure that the configuration settings for units of measure in the relevant modules (e.g., MM, PP) are correctly set up.
  
  
  
  Version Management:
  
  If the error is related to a specific version, check if there are any versioning issues with the order or component. You may need to update or correct the version information.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to this error message for any specific guidance or patches that may address the issue.
  
  
  
  Related Information:
  
  Transaction Codes: MM03 (Display Material), MM02 (Change Material), CS03 (Display BOM), CO03 (Display Production Order).
  SAP Notes: Check SAP Notes for any known issues or fixes related to this error message.
  Support: If the issue persists after checking the above points, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  By following these steps, you should be able to identify and resolve the cause of the MPE_OAN088 error message in SAP.