How To Fix RSAR428 - Communication structure & already exists.

SAP Error Message - Details

• Message type: E = Error

• Message class: RSAR - Data Transfer and Metadata Maintenance

• Message number: 428

• Message text: Communication structure & already exists.

What causes this issue?

A communication structure already exist for this InfoSource.
Therefore, the communication structure of the Content cannot be
transferred.

How to fix this error?

Delete the existing communication structure. Where necessary, also
delete dependent transfer and update rules.
Then try to transfer the Content again.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSAR428 - Communication structure & already exists. ?

  The SAP error message RSAR428 ("Communication structure & already exists") typically occurs in the context of SAP BW (Business Warehouse) when there is an attempt to create or modify a communication structure that already exists in the system. This can happen during the process of data extraction, transformation, or loading (ETL) when the system detects a naming conflict.
  Cause:
  
  
  Duplicate Communication Structure: The error indicates that a communication structure with the same name already exists in the system. This can happen if:
  
  You are trying to create a new communication structure with a name that is already in use.
  There was a previous attempt to create or modify a communication structure that was not completed successfully, leaving behind an entry in the system.
  
  
  
  Transport Issues: If you are transporting objects between systems (e.g., from development to production), there may be conflicts if the same communication structure exists in both systems.
  
  
  Solution:
  
  
  Check Existing Structures: 
  
  Use transaction code RSA1 to access the Data Warehousing Workbench.
  Navigate to the relevant area (e.g., InfoProviders, DataSources) and check if the communication structure already exists.
  If it does, you may need to modify your approach (e.g., use the existing structure instead of creating a new one).
  
  
  
  Rename or Delete: 
  
  If the existing communication structure is not needed, you can delete it or rename it if possible.
  Ensure that you have the necessary authorizations to perform these actions.
  
  
  
  Transport Management: 
  
  If the issue arises from a transport, ensure that the transport requests are correctly managed and that there are no conflicts between the source and target systems.
  
  
  
  Check for Incomplete Objects: 
  
  Sometimes, incomplete objects can cause issues. Check for any incomplete objects in the system and resolve them.
  
  
  
  Consult Documentation: 
  
  Review SAP documentation or notes related to this error for any specific guidance or patches that may address the issue.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench), SE11 (Data Dictionary), and SE80 (Object Navigator) for managing communication structures.
  SAP Notes: Check SAP Notes for any known issues or fixes related to this error message. You can search for RSAR428 in the SAP Support Portal.
  System Logs: Review system logs for additional context or related errors that may provide more insight into the issue.
  
  If the problem persists after trying the above solutions, consider reaching out to your SAP Basis or BW support team for further assistance.