How To Fix MPE_OAN171 - Work instruction &1, &2 referenced in OA &3, &4 not found

SAP Error Message - Details

• Message type: E = Error

• Message class: MPE_OAN - Operation Activity Network Messages

• Message number: 171

• Message text: Work instruction &1, &2 referenced in OA &3, &4 not found

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MPE_OAN171 - Work instruction &1, &2 referenced in OA &3, &4 not found ?

  The SAP error message MPE_OAN171 indicates that a work instruction referenced in an Operational Activity (OA) cannot be found. This typically occurs in the context of SAP's Manufacturing or Production Planning modules, where work instructions are essential for guiding production processes.
  Cause:
  
  Missing Work Instruction: The specified work instruction does not exist in the system. This could be due to it not being created, deleted, or not properly linked to the operational activity.
  Incorrect Configuration: The configuration settings for the work instructions or operational activities may be incorrect, leading to a mismatch.
  Data Inconsistency: There may be inconsistencies in the data, such as missing entries in the database or issues with the master data.
  Authorization Issues: The user may not have the necessary permissions to access the work instruction or operational activity.
  
  Solution:
  
  Verify Existence: Check if the work instruction referenced in the error message exists in the system. You can do this by navigating to the relevant transaction codes (e.g., CA03 for routing, or CO01 for production orders) and searching for the work instruction.
  Check Configuration: Ensure that the configuration for the work instructions and operational activities is set up correctly. This includes checking the links between the work instructions and the operational activities.
  Data Consistency Check: Run consistency checks on the master data to identify any discrepancies. This may involve using transaction codes like C223 or C223N to check for routing and work instruction consistency.
  Authorization Check: Ensure that the user has the necessary authorizations to access the work instruction and operational activity. This may involve checking user roles and permissions in the SAP system.
  Recreate Work Instruction: If the work instruction is indeed missing, you may need to recreate it or restore it from a backup if it was deleted.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CA03 (Display Routing), CO01 (Create Production Order), and C223 (Routing: Check).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes can provide additional context or solutions.
  Documentation: Review SAP documentation related to work instructions and operational activities for best practices and troubleshooting steps.
  Support: If the issue persists, consider reaching out to SAP support or your internal SAP support team for further assistance.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.