How To Fix MPE_OAN173 - Work instruction &1, vers. &2 is still referenced by OA &3, vers. &4

MPE_OAN173 - Overview

• Message type: E = Error

• Message class: MPE_OAN - Operation Activity Network Messages

• Message number: 173

• Message text: Work instruction &1, vers. &2 is still referenced by OA &3, vers. &4

Self-Explanatory Message

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MPE_OAN173 - Details

• The SAP error message MPE_OAN173 indicates that a work instruction (WI) is still being referenced by an operational activity (OA) in a specific version. This typically occurs in the context of SAP's Manufacturing or Production Planning modules, where work instructions are linked to operational activities for production processes.
  
  Cause:
  The error arises when you attempt to delete or modify a work instruction that is still in use by an operational activity. The system prevents this action to maintain data integrity and ensure that all references are valid.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Identify References: Check which operational activities are referencing the work instruction. The error message provides the OA and its version that is still linked to the WI.
  
  
  Review Operational Activities: Navigate to the operational activity (OA) mentioned in the error message. You can do this through the relevant transaction codes (e.g., CO02 for production orders, or other relevant transactions