How To Fix MPE_OAN235 - Variable &1 in work instruction &2, vers. &3 has more than one reference

SAP Error Message - Details

• Message type: E = Error

• Message class: MPE_OAN - Operation Activity Network Messages

• Message number: 235

• Message text: Variable &1 in work instruction &2, vers. &3 has more than one reference

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_OAN235 - Variable &1 in work instruction &2, vers. &3 has more than one reference ?

  The SAP error message MPE_OAN235 indicates that there is an issue with a variable in a work instruction that has multiple references. This typically occurs in the context of SAP's Manufacturing Execution (ME) or Advanced Planning and Optimization (APO) modules, where work instructions are used to guide production processes.
  Cause:
  The error arises when a variable (denoted as &1 in the message) in a specific work instruction (denoted as &2) and version (denoted as &3) is referenced more than once. This can happen due to:
  
  Duplicate Variable Definitions: The same variable is defined multiple times within the same work instruction.
  Incorrect Configuration: The work instruction may have been incorrectly configured, leading to multiple references to the same variable.
  Data Integrity Issues: There may be inconsistencies in the data that lead to multiple references being created unintentionally.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the Work Instruction: Check the work instruction identified in the error message. Look for the variable mentioned and see if it is defined or referenced multiple times.
  
  
  Consolidate Variable References: If the variable is indeed referenced multiple times, determine if it can be consolidated into a single reference. This may involve modifying the work instruction to ensure that each variable is unique.
  
  
  Check Configuration Settings: Review the configuration settings related to work instructions and variables in your SAP system. Ensure that there are no settings that allow for duplicate references.
  
  
  Data Cleanup: If the issue is due to data integrity problems, consider running data cleanup processes or using transaction codes that help identify and resolve inconsistencies in your work instructions.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance on managing work instructions and variables in your version of SAP.
  
  
  Seek Support: If the issue persists, consider reaching out to your SAP support team or consulting with SAP experts who can provide more tailored assistance based on your specific system configuration.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Transaction Codes: Familiarize yourself with transaction codes related to work instructions, such as IW31/IW32 for creating and changing work orders, which may help in diagnosing the issue.
  Training Resources: Consider training resources or documentation on SAP work instructions and variable management to prevent similar issues in the future.
  
  By following these steps, you should be able to identify and resolve the cause of the MPE_OAN235 error in your SAP system.