How To Fix /IWFND/CM_MGW_RT057 - Complex Type &1 not defined in Metadata

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_MGW_RT -

• Message number: 057

• Message text: Complex Type &1 not defined in Metadata

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_MGW_RT057 - Complex Type &1 not defined in Metadata ?

  The SAP error message /IWFND/CM_MGW_RT057 Complex Type &1 not defined in Metadata typically occurs in the context of SAP Gateway services, particularly when there is an issue with the metadata definition of a complex type in an OData service. This error indicates that the system is unable to find the definition of a specified complex type in the service's metadata.
  Cause:
  
  Missing Complex Type Definition: The complex type referenced in the error message is not defined in the service's metadata. This could happen if the complex type was not created or was deleted.
  Incorrect Service Registration: The OData service may not be properly registered or activated in the SAP Gateway.
  Model Issues: There may be inconsistencies or errors in the data model that prevent the complex type from being recognized.
  Versioning Issues: If there are multiple versions of the service, the complex type may exist in one version but not in another.
  
  Solution:
  
  Check Metadata: Verify the metadata of the OData service to ensure that the complex type is defined. You can do this by accessing the service's metadata URL (e.g., /sap/opu/odata/sap/YOUR_SERVICE_NAME/$metadata).
  Define the Complex Type: If the complex type is missing, you need to define it in the service's data model. This can be done in the SAP Gateway Service Builder (transaction code SEGW).
  Activate the Service: Ensure that the OData service is activated in the SAP Gateway. You can do this using transaction code /IWFND/MAINT_SERVICE.
  Regenerate the Service: If changes were made to the data model, regenerate the service to ensure that all definitions are up to date. This can be done in the Service Builder by right-clicking on the service and selecting "Generate".
  Check for Errors in the Model: Look for any inconsistencies or errors in the data model that might prevent the complex type from being recognized.
  Clear Cache: Sometimes, clearing the cache of the SAP Gateway can resolve issues related to outdated metadata. You can do this using transaction code /IWFND/CACHE.
  
  Related Information:
  
  Transaction Codes:
  
  SEGW: Service Builder for OData services.
  /IWFND/MAINT_SERVICE: Maintenance of OData services.
  /IWFND/CACHE: Cache management for SAP Gateway.
  
  
  Documentation: Refer to SAP Help documentation for OData services and SAP Gateway for detailed guidance on defining complex types and managing services.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to this error message.
  
  By following these steps, you should be able to resolve the error and ensure that the complex type is properly defined and recognized in your OData service.