How To Fix /IWBEP/CM_MGW_RT020 - Resource not found for segment '&'

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_MGW_RT -

• Message number: 020

• Message text: Resource not found for segment '&'

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_MGW_RT020 - Resource not found for segment '&' ?

  The SAP error message /IWBEP/CM_MGW_RT020 Resource not found for segment '&' typically occurs in the context of SAP Gateway and OData services. This error indicates that the requested resource (segment) in the OData service is not found. Here’s a breakdown of the cause, potential solutions, and related information:
  Cause:
  
  Incorrect URL: The URL used to access the OData service may be incorrect or malformed, leading to a request for a non-existent resource.
  Missing Entity Set: The entity set that you are trying to access may not be defined in the OData service or may not be exposed correctly.
  Authorization Issues: The user may not have the necessary authorizations to access the requested resource.
  Service Activation: The OData service may not be activated in the SAP Gateway system.
  Data Model Changes: If there have been changes to the data model (like renaming or deleting an entity), the service may not reflect those changes.
  
  Solutions:
  
  Check the URL: Verify that the URL you are using to access the OData service is correct. Ensure that the segment you are trying to access is valid.
  Review the OData Service:
  
  Use transaction code /IWFND/MAINT_SERVICE to check if the service is active and properly registered.
  Ensure that the entity set you are trying to access is defined in the service.
  
  
  Check Authorizations: Ensure that the user has the necessary authorizations to access the OData service and the specific entity set.
  Service Metadata: Access the service metadata (usually at the URL .../$metadata) to review the available entity sets and ensure that the requested segment exists.
  Re-activate the Service: If there have been changes to the service or data model, consider re-activating the service using transaction /IWFND/MAINT_SERVICE.
  Debugging: If you have access to the backend, you can debug the OData service implementation to see where the request is failing.
  
  Related Information:
  
  SAP Gateway: Understand the architecture of SAP Gateway and how OData services are structured.
  OData Protocol: Familiarize yourself with the OData protocol and how it handles resources and segments.
  SAP Notes: Check for any relevant SAP Notes that might address known issues or provide additional troubleshooting steps.
  Community Forums: Engage with SAP community forums or support channels for additional insights or similar issues faced by other users.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.