How To Fix /IWBEP/CM_MGW_BOP_DT161 - Old &1 and new &2 concatenated prefixes are equal

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWBEP/CM_MGW_BOP_DT -

• Message number: 161

• Message text: Old &1 and new &2 concatenated prefixes are equal

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWBEP/CM_MGW_BOP_DT161 - Old &1 and new &2 concatenated prefixes are equal ?

  The SAP error message /IWBEP/CM_MGW_BOP_DT161 indicates that there is an issue with the concatenated prefixes in the context of OData services, specifically when dealing with data binding or entity sets. The message states that the old and new concatenated prefixes are equal, which typically means that there is an attempt to change a prefix in a way that does not actually modify it.
  Cause:
  
  Data Model Configuration: The error often arises when there is a mismatch or redundancy in the configuration of the OData service, particularly in the way entity sets or data models are defined.
  Service Implementation: If the service implementation is trying to update or change a prefix that is already set to the same value, this error can occur.
  Versioning Issues: If there are multiple versions of the service or if the service has been modified without proper version control, it can lead to inconsistencies in the prefixes.
  
  Solution:
  
  Check Data Model: Review the data model configuration in the SAP Gateway Service Builder (transaction code SEGW). Ensure that the entity sets and their prefixes are correctly defined and do not have redundant or conflicting definitions.
  Update Service Implementation: If you are modifying the service implementation, ensure that any changes to prefixes are necessary and actually result in a different value. If the prefix is meant to remain the same, you may need to adjust your logic to avoid unnecessary updates.
  Clear Cache: Sometimes, clearing the cache for the OData service can resolve issues related to stale data. You can do this by using transaction code /IWFND/MAINT_SERVICE to maintain the service and then clear the cache.
  Check for Duplicates: Ensure that there are no duplicate entries in the service definition that could be causing the prefixes to be treated as equal.
  Debugging: If the issue persists, consider debugging the service to trace where the prefixes are being set and why they are being treated as equal.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context on how to resolve it.
  OData Documentation: Review the SAP OData documentation for best practices on defining entity sets and managing prefixes.
  Community Forums: Engage with the SAP Community or forums where similar issues may have been discussed, as other users may have encountered and resolved the same error.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.