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Message type: E = Error
Message class: WL - Workflow: run-time messages
Message number: 020
Message text: Class & cannot be instantiated or interface & is not supported
Could not create instance of class &V1& dynamically, or the class does
not support interface &V2&.
Processing is aborted.
Check class &V1&. This class must implement interface &V2&.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
WL020
- Class & cannot be instantiated or interface & is not supported ?The SAP error message:
WL020 Class & cannot be instantiated or interface & is not supported
typically occurs in the context of SAP Web Dynpro or related ABAP Object-Oriented programming environments.
Cause
This error indicates that the system is trying to instantiate a class or use an interface that:
Check the Class/Interface Definition:
Use the Correct Implementation Class:
CREATE OBJECT <interface>
, use CREATE OBJECT <concrete_class>
.Check Activation and Existence:
Check for System or Component Support:
Review the Code:
Check for Transport or Upgrade Issues:
Debugging:
Aspect | Details |
---|---|
Cause | Attempt to instantiate an abstract class or interface; unsupported class/interface used. |
Solution | Instantiate a concrete class implementing the interface; ensure objects are active and supported. |
Check | Class/interface activation, system support, correct usage in code, and transport status. |
If you provide the exact class and interface names (the placeholders & in the message), I can help you with more specific guidance.
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