How To Fix RAP_DESIGNTIME010 - Unknown action return kind

SAP Error Message - Details

• Message type: E = Error

• Message class: RAP_DESIGNTIME - RAP Designtime Messages

• Message number: 010

• Message text: Unknown action return kind

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message RAP_DESIGNTIME010 - Unknown action return kind ?

  The SAP error message RAP_DESIGNTIME010: Unknown action return kind typically occurs in the context of the SAP RAP (Rapid Application Programming) model, particularly when defining actions in your business object definitions. This error indicates that there is an issue with the return type specified for an action in your RAP service definition.
  Cause:
  The error is usually caused by one of the following issues:
  
  Invalid Return Type: The return type specified for an action is not recognized or is incorrectly defined. This could happen if the return type is not one of the expected types (e.g., entity, boolean, void, etc.).
  Syntax Errors: There may be syntax errors in the definition of the action or its return type.
  Inconsistent Definitions: The action might be defined in a way that does not align with the expected structure of the RAP model.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Action Definition: Review the action definition in your business object. Ensure that the return type is correctly specified and is one of the valid types supported by RAP.
  Example of a valid action definition:
  define action myAction
    alias 'MyAction'
    result [1] $self
  
  
  Validate Syntax: Ensure that there are no syntax errors in your action definition. Use the ABAP Development Tools (ADT) in Eclipse to check for any warnings or errors in your code.
  
  
  Refer to Documentation: Consult the SAP documentation for RAP to ensure that you are using the correct syntax and return types for actions. The documentation provides examples and guidelines for defining actions.
  
  
  Check for Updates: Ensure that your SAP system is up to date with the latest support packages and notes, as there may be fixes or enhancements related to RAP.
  
  
  Test with Simple Actions: If you are unsure about the return types, try defining a simple action with a known return type (like void or boolean) to see if the error persists.
  
  
  Debugging: If the issue continues, consider debugging the service to trace where the error is being triggered. This can provide insights into what might be going wrong.
  
  
  Related Information:
  
  SAP Help Portal: The SAP Help Portal contains extensive documentation on RAP, including guidelines for defining actions and their return types.
  SAP Community: Engaging with the SAP Community can provide additional insights and solutions from other developers who may have encountered similar issues.
  SAP Notes: Check for any relevant SAP Notes that might address known issues or provide additional guidance on the RAP model.
  
  By following these steps, you should be able to identify and resolve the cause of the RAP_DESIGNTIME010 error in your SAP RAP application.