How To Fix DMU158 - Class &1 with class type &2 is not a subclass of &3

DMU158 - Overview

• Message type: E = Error

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

• Message number: 158

• Message text: Class &1 with class type &2 is not a subclass of &3

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMU158 - Class &1 with class type &2 is not a subclass of &3 ?

  The SAP error message DMU158 indicates that there is an issue with class inheritance in the context of the Data Migration Workbench (DMW) or similar object-oriented programming scenarios in SAP. Specifically, the error message states that a class (denoted as &1) with a certain class type (denoted as &2) is not a subclass of another specified class (denoted as &3). 
  
  Cause:
  
  Class Hierarchy Issue: The class you are trying to use is not correctly defined as a subclass of the expected parent class. This could be due to incorrect class definitions or misconfigurations in the class hierarchy.
  Incorrect Class Type: The class type specified may not be compatible with the expected class type. For example, you might be trying to use a class that is not intended to inherit from the specified parent class.
  Transport Issues: If the class was recently transported from another system, there may be inconsistencies in the class definitions