How To Fix SCWN800 - Class contains complex type definitions

SAP Error Message - Details

• Message type: E = Error

• Message class: SCWN - Messages Note installation and management

• Message number: 800

• Message text: Class contains complex type definitions

What causes this issue?

An attempt was made to import a class with the Correction Workbench,
however this class contains complex type definitions. This action is
not currently possible in the Correction Workbench.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SCWN800 - Class contains complex type definitions ?

  The SAP error message SCWN800, which states "Class contains complex type definitions," typically occurs in the context of SAP's Web Services or Service-Oriented Architecture (SOA) when dealing with the definition of classes that include complex types. This error indicates that the class you are trying to work with has complex data structures that are not being handled correctly in the context of the operation you are performing.
  Cause:
  
  Complex Type Definitions: The class in question may contain complex types (like structures or tables) that are not supported in the current context, such as when generating a web service or when trying to expose the class as a service.
  Incompatible Data Types: The data types used in the class may not be compatible with the expected input/output types for the web service.
  Service Definition Issues: There may be issues with how the service is defined or configured, leading to problems in interpreting the complex types.
  
  Solution:
  
  Review Class Definition: Check the class definition for any complex types. If possible, simplify the structure by breaking down complex types into simpler ones or using primitive types.
  Adjust Service Configuration: If you are exposing the class as a web service, ensure that the service configuration is set up to handle complex types. This may involve adjusting the service interface or the way the data is serialized.
  Use Data Transfer Objects (DTOs): Instead of using the complex class directly, consider creating a Data Transfer Object (DTO) that flattens the structure or uses simpler types that can be easily serialized and deserialized.
  Check for Updates: Ensure that your SAP system is up to date, as there may be patches or updates that address issues with complex type handling.
  Consult Documentation: Refer to SAP documentation for guidelines on how to handle complex types in web services or SOA scenarios. This can provide insights into best practices and potential workarounds.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or fixes related to SCWN800. SAP Notes often provide specific guidance for resolving errors.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Web Service Configuration: Familiarize yourself with the configuration settings for web services in SAP, particularly regarding how complex types are handled.
  Testing: After making changes, thoroughly test the web service to ensure that it behaves as expected and that the error does not recur.
  
  By following these steps, you should be able to address the SCWN800 error and successfully work with your class definitions in SAP.