How To Fix /IWFND/CM_MGW_EDP091 - -- Expand Entity Section --

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_MGW_EDP -

• Message number: 091

• Message text: -- Expand Entity Section --

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 /IWFND/CM_MGW_EDP091 - -- Expand Entity Section -- ?

  The SAP error message /IWFND/CM_MGW_EDP091 -- Expand Entity Section -- typically occurs in the context of SAP Gateway and OData services. This error indicates that there is an issue with the entity expansion in the OData service, which can be caused by various factors. Below are some common causes, potential solutions, and related information:
  Causes:
  
  Incorrect Entity Set Configuration: The entity set may not be properly configured in the OData service, leading to issues when trying to expand related entities.
  Navigation Properties: There may be issues with the navigation properties defined in the data model, such as missing or incorrectly defined relationships between entities.
  Service Metadata Issues: The service metadata might not be correctly generated or might be out of sync with the underlying data model.
  Authorization Issues: The user may not have the necessary authorizations to access the expanded entity.
  Data Model Changes: Changes in the underlying data model (like adding or removing fields) that are not reflected in the OData service can lead to this error.
  
  Solutions:
  
  
  Check Entity Set Configuration:
  
  Verify that the entity sets and their relationships are correctly defined in the OData service.
  Ensure that the navigation properties are correctly set up in the service definition.
  
  
  
  Regenerate Service Metadata:
  
  If there have been changes to the data model, regenerate the service metadata. You can do this by using transaction code /IWFND/MAINT_SERVICE to maintain the service and regenerate the metadata.
  
  
  
  Check Navigation Properties:
  
  Review the navigation properties in the data model to ensure they are correctly defined and that the relationships between entities are valid.
  
  
  
  Authorization Check:
  
  Ensure that the user has the necessary authorizations to access the expanded entity. Check the roles and authorizations assigned to the user.
  
  
  
  Debugging:
  
  Use the SAP Gateway Client (transaction /IWFND/GW_CLIENT) to test the OData service and see if you can reproduce the error. This can help identify the specific request causing the issue.
  
  
  
  Check for Errors in the Backend:
  
  If the OData service is calling a backend function or method, check for any errors or exceptions in the backend system that might be causing the issue.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found.
  OData Documentation: Review the official SAP documentation on OData services and SAP Gateway for best practices and troubleshooting tips.
  
  By following these steps, you should be able to identify and resolve the issue related to the /IWFND/CM_MGW_EDP091 error message.