How To Fix /IWBEP/CM_V4_MED255 - Hub metadata cache outdated; Hub='&1', BEP='&2'; execute request again

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_V4_MED -

• Message number: 255

• Message text: Hub metadata cache outdated; Hub='&1', BEP='&2'; execute request again

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_V4_MED255 - Hub metadata cache outdated; Hub='&1', BEP='&2'; execute request again ?

  The SAP error message /IWBEP/CM_V4_MED255 indicates that the metadata cache for the SAP Gateway hub is outdated. This typically occurs when there have been changes to the underlying data model or service definitions, and the cache has not been refreshed to reflect these changes. The message provides two parameters: Hub='&1' and BEP='&2', which refer to the specific hub and backend system involved.
  Cause:
  
  Changes in the Backend: If there have been updates to the OData service or changes in the underlying data model in the backend system, the metadata cache in the SAP Gateway hub may become outdated.
  Cache Expiration: The cache may have a defined expiration time, and if it is not refreshed within that time frame, it can lead to this error.
  Service Activation: If a new service has been activated or an existing service has been modified, the hub may not have the latest metadata.
  
  Solution:
  
  
  Refresh the Metadata Cache:
  
  You can manually refresh the metadata cache by executing the following steps:
  
  Go to the SAP Gateway Client (transaction /IWFND/GW_CLIENT).
  Execute a request to the OData service that is causing the issue. This should trigger a refresh of the metadata cache.
  
  
  
  
  
  Clear the Cache:
  
  You can clear the cache using transaction /IWFND/CACHE:
  
  Navigate to the transaction.
  Select the option to clear the cache for the specific service or for all services.
  
  
  
  
  
  Check Service Activation:
  
  Ensure that the OData service is properly activated in the SAP Gateway. You can check this in transaction /IWFND/MAINT_SERVICE.
  If the service is not active, activate it and check if the error persists.
  
  
  
  Re-execute the Request:
  
  After refreshing or clearing the cache, re-execute the request that generated the error to see if the issue is resolved.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional guidance or patches related to this error.
  System Logs: Review the system logs (transaction SLG1) for any additional error messages or warnings that may provide more context.
  Performance Considerations: Frequent cache invalidation can lead to performance issues. It is advisable to monitor the frequency of changes in the backend and adjust cache settings accordingly.
  
  If the issue persists after trying the above solutions, it may be necessary to involve your SAP Basis team or consult SAP support for further assistance.