How To Fix DMU151 - Relationship type requries compatability to class hierarchy

SAP Error Message - Details

• Message type: E = Error

• Message class: DMU - Digital Mock Up (DMU)

• Message number: 151

• Message text: Relationship type requries compatability to class hierarchy

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 DMU151 - Relationship type requries compatability to class hierarchy ?

  The SAP error message DMU151, which states "Relationship type requires compatibility to class hierarchy," typically occurs in the context of the Data Management Utility (DMU) or when working with classification and relationships in SAP. This error indicates that there is an issue with the relationship type you are trying to establish between classes or objects in the classification system.
  Cause:
  
  Incompatible Relationship Type: The relationship type you are trying to use is not compatible with the class hierarchy. This could be due to the relationship type not being defined correctly or not being allowed for the specific classes involved.
  Class Hierarchy Issues: The classes you are trying to relate may not be compatible in terms of their hierarchy or classification attributes.
  Missing Configuration: The relationship type may not be properly configured in the system, or the necessary settings for the class hierarchy may be missing.
  
  Solution:
  
  
  Check Relationship Type Configuration:
  
  Go to the configuration settings for relationship types in the SAP system.
  Ensure that the relationship type you are trying to use is defined and configured correctly for the classes involved.
  
  
  
  Verify Class Hierarchy:
  
  Review the class hierarchy of the objects you are working with. Ensure that the classes are compatible and that the relationship type is appropriate for the classes in question.
  You can use transaction codes like CL02 (Change Class) or CL03 (Display Class) to check the class definitions.
  
  
  
  Adjust Class Attributes:
  
  If necessary, modify the attributes of the classes to ensure compatibility with the relationship type you want to use.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific details on the relationship types and class hierarchies to ensure you are following the correct procedures.
  
  
  
  Testing:
  
  After making adjustments, test the relationship creation again to see if the error persists.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CL01 (Create Class), CL02 (Change Class), and CL03 (Display Class) for managing classes and relationships.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after following these steps, it may be beneficial to consult with your SAP support team or a technical consultant who specializes in SAP classification and data management.