How To Fix MDC_MODEL087 - Keeper class &1 must inherit from &2

SAP Error Message - Details

• Message type: E = Error

• Message class: MDC_MODEL - Messages In Context Of MDC Model

• Message number: 087

• Message text: Keeper class &1 must inherit from &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.

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 MDC_MODEL087 - Keeper class &1 must inherit from &2 ?

  The SAP error message MDC_MODEL087, which states "Keeper class &1 must inherit from &2," typically occurs in the context of SAP's Model Driven Configuration (MDC) framework. This error indicates that a specific class (the "Keeper class") is not correctly inheriting from the expected base class.
  Cause:
  
  Incorrect Class Definition: The Keeper class defined in your model does not extend or inherit from the required base class. This can happen if the class was manually created or modified without following the inheritance rules.
  Model Configuration Issues: There may be issues in the model configuration where the class hierarchy is not properly set up.
  Version Mismatch: If there are version differences between the classes or if the system has been upgraded, the inheritance structure may have changed.
  
  Solution:
  
  Check Class Definition: Verify the definition of the Keeper class. Ensure that it correctly inherits from the specified base class. You can do this by checking the class properties in the SAP system.
  Modify Inheritance: If the class does not inherit from the required base class, modify the class definition to ensure it does. This may involve editing the class in the ABAP Workbench (SE80) or the relevant development environment.
  Review Model Configuration: Check the model configuration settings to ensure that all classes are correctly defined and that the inheritance structure is intact.
  Consult Documentation: Refer to the SAP documentation for the specific version you are using to understand the expected class hierarchy and any changes that may have been introduced in recent updates.
  Testing: After making changes, test the model to ensure that the error is resolved and that the functionality works as expected.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on class inheritance in MDC.
  Community Forums: Look for discussions in SAP Community forums or other developer communities where similar issues may have been addressed.
  ABAP Development Guidelines: Familiarize yourself with best practices for class design and inheritance in ABAP to avoid similar issues in the future.
  
  If the problem persists after following these steps, consider reaching out to SAP support for further assistance.