How To Fix CNV_CDMC_CTS001 - Enter exactly one system with role 'A'

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_CDMC_CTS - CDMC Change and Transport System Analysis

• Message number: 001

• Message text: Enter exactly one system with role 'A'

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 CNV_CDMC_CTS001 - Enter exactly one system with role 'A' ?

  The SAP error message CNV_CDMC_CTS001 typically occurs during the execution of a conversion or migration process, particularly when using the SAP Conversion Tools (like the SAP S/4HANA Migration Cockpit). This error indicates that the system expects exactly one system to be defined with the role 'A' (which usually stands for "Source System" or "Application System") in the configuration, but it has found either none or more than one.
  Cause:
  
  Incorrect Configuration: The system configuration may not have a single source system defined with the role 'A'.
  Multiple Systems Defined: There may be multiple systems defined with the role 'A', which leads to ambiguity.
  Missing Role Assignment: The required system might not have been assigned the correct role in the configuration.
  
  Solution:
  
  
  Check System Configuration:
  
  Go to the relevant transaction (often LTMC or SCC4 depending on the context) and check the configuration of the systems.
  Ensure that there is exactly one system defined with the role 'A'.
  
  
  
  Adjust Role Assignments:
  
  If there are multiple systems with the role 'A', you need to either remove the extra entries or change their roles to something else.
  If no system is defined, you need to add a system with the appropriate role.
  
  
  
  Review Migration Settings:
  
  If you are using a migration project, ensure that the project settings are correctly configured to point to the right source system.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for the specific migration tool you are using to ensure that all prerequisites and configurations are met.
  
  
  
  Check Authorizations:
  
  Ensure that you have the necessary authorizations to view and modify the system configuration.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes like LTMC (for Migration Cockpit) or SCC4 (for client settings) to manage system roles.
  SAP Notes: Check for any SAP Notes related to the error message for additional troubleshooting steps or patches.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after following these steps, consider reaching out to SAP support for further assistance.