How To Fix /ISDFPS/MM171 - BAdI '&1' must be implemented once only

SAP Error Message - Details

• Message type: E = Error

• Message class: /ISDFPS/MM -

• Message number: 171

• Message text: BAdI '&1' must be implemented once only

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /ISDFPS/MM171 - BAdI '&1' must be implemented once only ?

  The SAP error message /ISDFPS/MM171 BAdI '&1' must be implemented once only indicates that a Business Add-In (BAdI) has been implemented multiple times, which is not allowed. BAdIs are used in SAP to allow for enhancements to standard SAP applications without modifying the original code. Each BAdI can only have one active implementation at a time unless it is defined as multiple-use.
  Cause:
  
  Multiple Implementations: The most common cause of this error is that the BAdI has been implemented more than once in the system. This can happen if different developers or teams create their own implementations without checking existing ones.
  Transport Issues: Sometimes, if the BAdI implementation is transported from one system to another (e.g., from development to production), it may lead to conflicts if the same BAdI is already implemented in the target system.
  
  Solution:
  
  
  Check Existing Implementations:
  
  Go to transaction code SE19 (BAdI Implementation) or SE18 (BAdI Definition).
  Enter the name of the BAdI that is causing the error and check if there are multiple implementations.
  If you find multiple implementations, you will need to deactivate or delete the unnecessary ones.
  
  
  
  Deactivate Unused Implementations:
  
  If you identify that there are multiple implementations, you can deactivate the ones that are not needed.
  To do this, select the implementation you want to deactivate and choose the option to deactivate it.
  
  
  
  Use a Single Implementation:
  
  If you need to keep the functionality of multiple implementations, consider consolidating the logic into a single implementation that can handle all required scenarios.
  
  
  
  Check Transport Requests:
  
  If the issue arose after a transport, check the transport requests to ensure that the BAdI implementation was not duplicated during the transport process.
  
  
  
  Consult Documentation:
  
  Review any documentation related to the BAdI to understand its intended use and any specific requirements for implementation.
  
  
  
  Related Information:
  
  BAdI Definition: You can find the definition of the BAdI in transaction SE18. This will provide you with details on how the BAdI is supposed to be used.
  BAdI Implementation: Use transaction SE19 to manage BAdI implementations. You can create, modify, or delete implementations from here.
  SAP Notes: Check SAP Notes for any known issues or additional guidance related to the specific BAdI you are working with.
  
  By following these steps, you should be able to resolve the error and ensure that the BAdI is implemented correctly in your SAP system.