Message type: E = Error
Message class: /IWXBE/CORE -
Message number: 019
Message text: Class '&1' cannot be used; derive an own sub-class
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/IWXBE/CORE019
- Class '&1' cannot be used; derive an own sub-class ?The SAP error message /IWXBE/CORE019 Class '&1' cannot be used; derive an own sub-class typically occurs in the context of the SAP Business Workflow or Business Object Processing Framework (BOPF). This error indicates that the specified class cannot be used directly and that you need to create a subclass to extend its functionality.
Cause: Abstract Class: The class you are trying to use is likely an abstract class or a base class that is not intended to be instantiated directly. In object-oriented programming, abstract classes are designed to be subclassed and cannot be instantiated on their own. Framework Restrictions: The framework may impose restrictions on the use of certain classes to ensure that specific business logic or behaviors are implemented correctly through subclasses. Missing Implementation: The class may lack the necessary implementations for certain methods or properties that are required for your specific use case.
Solution: Create a Subclass: Go to the Class Builder (transaction SE24). Enter the
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