How To Fix CNV_20000155 - Leading ledger not present in the system

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_20000 - Messages for fiscal year change

• Message number: 155

• Message text: Leading ledger not present in the system

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_20000155 - Leading ledger not present in the system ?

  The SAP error message CNV_20000155: Leading ledger not present in the system typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that the system is unable to find a leading ledger configuration in the system, which is essential for financial data processing.
  Cause:
  
  Missing Leading Ledger: The leading ledger (often referred to as the "0L" ledger in SAP) is not defined in the system. This can happen if the system was not properly configured or if the ledger was deleted or not created during the initial setup.
  Incorrect Configuration: The configuration settings for the financial accounting module may not be set up correctly, leading to the absence of a leading ledger.
  Migration Issues: During data migration, if the source system does not have a leading ledger or if the migration settings do not map correctly to the target system's ledger configuration, this error can occur.
  
  Solution:
  
  
  Check Ledger Configuration:
  
  Go to the SAP transaction code OB22 (or use the path: SPRO > Financial Accounting > General Ledger > Master Data > Define Ledgers).
  Verify if the leading ledger (usually "0L") is defined and active in the system.
  If it is missing, you may need to create it or restore it from a backup if it was deleted.
  
  
  
  Create a Leading Ledger:
  
  If the leading ledger does not exist, you can create it by following the steps in the configuration menu. Ensure that you set it as the leading ledger and configure the necessary settings (like currency, fiscal year variant, etc.).
  
  
  
  Check Migration Settings:
  
  If you are performing a migration, ensure that the migration settings correctly reference the leading ledger. Review the mapping and ensure that the source data aligns with the target system's ledger configuration.
  
  
  
  Consult Documentation:
  
  Review the SAP documentation related to the migration process you are using. There may be specific steps or prerequisites that need to be followed to ensure that the leading ledger is correctly set up.
  
  
  
  SAP Notes and Support:
  
  Check for any relevant SAP Notes that may address this specific error. SAP Notes often provide fixes or workarounds for known issues.
  If the issue persists, consider reaching out to SAP Support for assistance.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as OB22 (Define Ledgers), OBA7 (Define Document Types), and others related to financial accounting configuration.
  Migration Cockpit: If using the SAP S/4HANA Migration Cockpit, ensure that you are following the correct procedures for data migration, including pre-checks and validations.
  System Logs: Check system logs (transaction SLG1) for additional error messages or warnings that may provide more context about the issue.
  
  By following these steps, you should be able to resolve the error CNV_20000155 and ensure that your leading ledger is properly configured in the SAP system.