How To Fix S_UNIFIED_CON_API255 - Including CA must be unique

SAP Error Message - Details

• Message type: E = Error

• Message class: S_UNIFIED_CON_API - Messages for API for Unified Connectivity

• Message number: 255

• Message text: Including CA must be unique

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 S_UNIFIED_CON_API255 - Including CA must be unique ?

  The SAP error message S_UNIFIED_CON_API255 with the description "Including CA must be unique" typically occurs in the context of SAP's Unified Communication API, particularly when there is an issue with the configuration of communication arrangements (CAs) in the system.
  Cause:
  The error indicates that there is a duplication in the configuration of communication arrangements. Each communication arrangement must be unique, and if there are multiple arrangements with the same identifier or configuration, the system will throw this error. This can happen due to:
  
  Duplicate Entries: Two or more communication arrangements have been created with the same key or identifier.
  Incorrect Configuration: The configuration settings for the communication arrangements may not be set up correctly, leading to conflicts.
  Data Migration Issues: If data has been migrated from another system, it may have introduced duplicates.
  
  Solution:
  To resolve the error, you can follow these steps:
  
  
  Check Existing Communication Arrangements:
  
  Go to the relevant transaction in SAP (e.g., Manage Communication Arrangements).
  Review the list of existing communication arrangements to identify any duplicates.
  
  
  
  Identify Duplicates:
  
  Look for entries that have the same identifier or configuration settings.
  You may need to filter or sort the list to make it easier to spot duplicates.
  
  
  
  Delete or Modify Duplicates:
  
  If you find duplicate entries, decide which one to keep and delete the others.
  If necessary, modify the configuration of the duplicates to ensure they are unique.
  
  
  
  Validate Configuration:
  
  After making changes, validate the configuration to ensure that it meets the requirements and does not conflict with other arrangements.
  
  
  
  Test the Configuration:
  
  After resolving the duplicates, test the communication arrangements to ensure that they are functioning as expected.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SCOT (for SAPconnect settings) or SICF (for Internet Communication Framework) if applicable.
  Documentation: Refer to SAP Help documentation for Unified Communication and Communication Arrangements for detailed guidelines on configuration.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  If the issue persists after following these steps, consider reaching out to your SAP support team or consulting the SAP Community for further assistance.