How To Fix /IWFND/CM_V4_COS166 - System alias '&1' is still in use

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWFND/CM_V4_COS -

• Message number: 166

• Message text: System alias '&1' is still in use

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWFND/CM_V4_COS166 - System alias '&1' is still in use ?

  The SAP error message /IWFND/CM_V4_COS166 indicates that a system alias (represented by &1) is still in use, which typically means that there are active connections or references to that system alias that prevent it from being deleted or modified.
  Cause:
  
  Active Connections: The system alias is currently being used by one or more services or applications.
  Configuration Issues: There may be configuration settings or dependencies that are still referencing the system alias.
  Caching: Sometimes, caching mechanisms may hold onto the alias, causing it to appear as still in use.
  
  Solution:
  To resolve this error, you can follow these steps:
  
  
  Check Active Services:
  
  Use transaction code /IWFND/MAINT_SERVICE to check if there are any active services that are using the system alias. If there are, you may need to deactivate or remove those services before you can delete or modify the alias.
  
  
  
  Review System Alias Usage:
  
  Go to transaction code /IWFND/CM_COS to see the list of system aliases and their usage. This will help you identify where the alias is being referenced.
  
  
  
  Clear Caches:
  
  If you suspect caching is the issue, you can clear the cache. Use transaction code /IWFND/CACHE to clear the cache for OData services.
  
  
  
  Check for Dependencies:
  
  Ensure that there are no other configurations or settings that depend on the system alias. This may include checking for any custom implementations or extensions that might be using the alias.
  
  
  
  Consult Logs:
  
  Check the application logs (transaction code SLG1) for any additional error messages or warnings that might provide more context on why the alias is still in use.
  
  
  
  System Restart:
  
  In some cases, a system restart may help clear any lingering connections or references to the system alias.
  
  
  
  Related Information:
  
  Documentation: Refer to SAP Help documentation for more details on managing system aliases and OData services.
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to system aliases and the error message you are encountering.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other users who may have faced similar issues.
  
  By following these steps, you should be able to identify the cause of the error and take appropriate action to resolve it.