How To Fix FC399 - Not currently possible to change G/L account length, conversion active

SAP Error Message - Details

• Message type: E = Error

• Message class: FC - FI configuration error messages

• Message number: 399

• Message text: Not currently possible to change G/L account length, conversion active

What causes this issue?

You changed the G/L account length in the chart of accounts &V1& from
&V2& to &V3&.
A conversion for renumbering G/L Accounts is open at present.

System Response

The G/L account length cannot be changed while a conversion for
renumbering G/L Accounts is open.

How to fix this error?

First close the conversion for renumbering G/L Accounts.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FC399 - Not currently possible to change G/L account length, conversion active ?

  The SAP error message FC399, which states "Not currently possible to change G/L account length, conversion active," typically occurs when there is an attempt to change the length of a General Ledger (G/L) account in a system where a conversion is active. This situation can arise during the migration or upgrade of the system, or when there are ongoing processes that depend on the current G/L account structure.
  Cause:
  
  Active Conversion: The system is currently undergoing a conversion process (e.g., from one chart of accounts to another) that prevents changes to the G/L account length.
  Data Integrity: SAP enforces data integrity and consistency, and changing the G/L account length while a conversion is active could lead to inconsistencies in financial data.
  Configuration Settings: The configuration settings in the system may not allow changes to the G/L account length during certain operations.
  
  Solution:
  
  Check Conversion Status: Verify if there is an active conversion process. If so, you may need to wait until the conversion is completed before attempting to change the G/L account length.
  Review Configuration: Check the configuration settings in the Financial Accounting (FI) module to ensure that the system is set up correctly for the desired changes.
  Consult Documentation: Refer to SAP documentation or notes related to G/L account changes and conversions for specific guidance.
  Contact SAP Support: If the issue persists, consider reaching out to SAP support for assistance, especially if this is part of a larger migration or upgrade project.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like OX15 (for chart of accounts) or OX19 (for G/L account length) to review and adjust settings.
  SAP Notes: Look for relevant SAP Notes that may address this specific error or provide additional context on handling G/L account changes.
  Testing Environment: If possible, replicate the issue in a testing environment to better understand the implications of changing the G/L account length and to test potential solutions without affecting production data.
  
  Best Practices:
  
  Always back up your data before making significant changes to the G/L account structure.
  Document any changes made to the configuration for future reference.
  Ensure that all stakeholders are informed about the changes and their potential impact on financial reporting and operations.
  
  By following these steps, you should be able to address the FC399 error and proceed with the necessary changes to the G/L account length.