How To Fix CNV_CDOP_UCIA028 - Enter exactly one system with role R

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_CDOP_UCIA - CDOP Upgrade/Change Impact Analysis

• Message number: 028

• Message text: Enter exactly one system with role R

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 CNV_CDOP_UCIA028 - Enter exactly one system with role R ?

  The SAP error message CNV_CDOP_UCIA028 typically occurs during the execution of a conversion or migration process, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that the system expects exactly one system to be defined with the role "R" (which usually stands for "Reference" or "Source") in the configuration, but it has found either none or multiple systems defined with that role.
  Cause:
  
  Incorrect Configuration: The system configuration may not have a single source system defined with the required role.
  Multiple Systems Defined: There may be multiple systems configured with the role "R", which is not allowed for the operation you are trying to perform.
  Missing Role Assignment: The required role may not have been assigned to any system in the configuration.
  
  Solution:
  
  
  Check System Configuration:
  
  Go to the relevant configuration transaction (e.g., transaction code SCC4 or the specific migration cockpit configuration).
  Verify the list of systems and their assigned roles.
  Ensure that there is exactly one system defined with the role "R".
  
  
  
  Modify System Roles:
  
  If there are multiple systems with the role "R", you will need to either remove the role from the additional systems or change their roles to something else.
  If no system is assigned the role "R", you will need to assign one of the systems to this role.
  
  
  
  Re-run the Process:
  
  After making the necessary adjustments, re-run the migration or conversion process to see if the error persists.
  
  
  
  Related Information:
  
  Documentation: Refer to the official SAP documentation for the specific migration or conversion tool you are using. This can provide insights into the expected configuration and roles.
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Support: If the issue persists after checking the configuration, consider reaching out to SAP Support for further assistance.
  
  By ensuring that your system configuration meets the requirements for the migration or conversion process, you should be able to resolve the CNV_CDOP_UCIA028 error.