How To Fix MDG_BS_BP021 - Class &1 does not contain interface &2

SAP Error Message - Details

• Message type: E = Error

• Message class: MDG_BS_BP - MDG BP: general messages

• Message number: 021

• Message text: Class &1 does not contain interface &2

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 MDG_BS_BP021 - Class &1 does not contain interface &2 ?

  The SAP error message MDG_BS_BP021 indicates that a specific class does not implement a required interface. This error typically arises in the context of SAP Master Data Governance (MDG) for Business Partners (BP). Here’s a breakdown of the cause, potential solutions, and related information:
  Cause
  The error occurs when the system expects a class (denoted as &1 in the error message) to implement a specific interface (denoted as &2), but it does not. This can happen due to several reasons:
  
  Missing Implementation: The class may not have been properly implemented to include the required interface.
  Configuration Issues: There may be issues in the configuration of the MDG system that lead to this mismatch.
  Transport Issues: If the class was transported from another system, the transport might not have included all necessary components.
  Custom Development: If there are custom classes or interfaces involved, they may not be correctly defined or activated.
  
  Solution
  To resolve the error, you can follow these steps:
  
  
  Check Class Implementation:
  
  Go to the ABAP Workbench (SE80 or SE24) and check the class mentioned in the error message.
  Ensure that the class implements the required interface. If it does not, you may need to modify the class to implement the interface.
  
  
  
  Review Configuration:
  
  Check the configuration settings in the MDG system related to Business Partner processing. Ensure that all necessary settings are correctly configured.
  
  
  
  Transport Check:
  
  If the class was transported, verify that all related objects (including interfaces) were included in the transport request. You may need to re-transport the missing components.
  
  
  
  Custom Code Review:
  
  If you have custom developments, review the code to ensure that all classes and interfaces are correctly defined and activated.
  
  
  
  System Logs:
  
  Check the system logs (transaction SLG1) for any additional error messages or warnings that might provide more context about the issue.
  
  
  
  SAP Notes:
  
  Search for relevant SAP Notes in the SAP Support Portal that might address this specific error. There may be patches or updates available that resolve the issue.
  
  
  
  Consult Documentation:
  
  Review the official SAP documentation for MDG and Business Partner to ensure that you are following the recommended practices.
  
  
  
  Related Information
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SE80 (Object Navigator), SE24 (Class Builder), and SLG1 (Application Log).
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  SAP Support: If the issue persists, consider reaching out to SAP Support for assistance, especially if it involves standard SAP classes and interfaces.
  
  By following these steps, you should be able to identify and resolve the issue related to the error message MDG_BS_BP021.