How To Fix OO851 - BAdI interface method &1 should 'Emulate empty method implementation'

SAP Error Message - Details

• Message type: E = Error

• Message class: OO - Class Builder/API

• Message number: 851

• Message text: BAdI interface method &1 should 'Emulate empty method implementation'

What causes this issue?

The option 'Emulate empty method implementation' is not set for the
interface method.
You should choose this runtime behavior in case you cannot make sure
that an implementation for this method will always exist, otherwise
runtime errors could occur.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Choose 'Emulate empty method implementation'.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OO851 - BAdI interface method &1 should 'Emulate empty method implementation' ?

  The SAP error message OO851 indicates that a Business Add-In (BAdI) interface method is expected to have an "empty method implementation." This typically occurs when a BAdI is defined but not properly implemented in the context of the application or when the implementation does not conform to the expected behavior.
  Cause:
  
  Missing Implementation: The BAdI method has not been implemented in any active implementation.
  Incorrect Implementation: The implementation exists but does not follow the expected structure or is not correctly defined.
  Interface Definition: The BAdI interface may require that certain methods are implemented in a specific way, and if they are not, this error can occur.
  
  Solution:
  
  Check Implementations: Go to the BAdI implementation transaction (SE19) and check if there are any active implementations for the BAdI in question. If not, you may need to create one.
  Create/Modify Implementation:
  
  If there is no implementation, create a new one by selecting the BAdI and implementing the required methods.
  If an implementation exists, ensure that it includes the necessary methods and that they are correctly defined. You may need to add an empty implementation for the method that is causing the error.
  
  
  Use the Correct Method Signature: Ensure that the method signature in your implementation matches the one defined in the BAdI interface.
  Check for Activation: After making changes, ensure that the implementation is activated. You can do this in the implementation screen.
  Debugging: If the issue persists, consider debugging the code to see where the error is being triggered and to understand the flow of execution.
  
  Related Information:
  
  BAdI Definition: BAdIs are a way to enhance SAP applications without modifying the original code. They allow developers to add custom functionality.
  SE18 and SE19 Transactions: Use transaction SE18 to view BAdI definitions and SE19 to implement them.
  Documentation: Check the documentation for the specific BAdI to understand its purpose and the expected behavior of its methods.
  SAP Notes: Look for any relevant SAP Notes that might address known issues or provide additional guidance on the specific BAdI you are working with.
  
  By following these steps, you should be able to resolve the OO851 error and ensure that your BAdI implementation is functioning as expected.