How To Fix FAGL_MIG128 - No FI-SL source ledger stored for migration plan &1

SAP Error Message - Details

• Message type: E = Error

• Message class: FAGL_MIG - Migration to New General Ledger Accounting

• Message number: 128

• Message text: No FI-SL source ledger stored for migration plan &1

What causes this issue?

No assigned FI-SL source ledger found for the migration plan.

System Response

Processing is terminated.

How to fix this error?

If you have selected a migration type that involves the transfer of
document splitting information from a special purpose ledger, enter a
source ledger in Customizing for the migration.

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 FAGL_MIG128 - No FI-SL source ledger stored for migration plan &1 ?

  The SAP error message FAGL_MIG128 indicates that there is no Financial Accounting (FI) Subledger (FI-SL) source ledger stored for the specified migration plan. This error typically occurs during the migration process when you are trying to migrate data from an existing system to the new General Ledger (G/L) in SAP S/4HANA.
  Cause:
  
  Missing Configuration: The migration plan you are using does not have a source ledger defined in the system.
  Incorrect Migration Plan: The migration plan specified may not be correctly set up or may not correspond to the existing FI-SL ledgers.
  Data Migration Issues: There may be issues with the data migration setup, such as missing entries in the configuration tables.
  
  Solution:
  To resolve the FAGL_MIG128 error, you can follow these steps:
  
  
  Check Migration Plan Configuration:
  
  Go to the transaction code OBY6 (or the relevant configuration transaction) to check the configuration of your migration plan.
  Ensure that the source ledger is correctly defined for the migration plan you are using.
  
  
  
  Define Source Ledger:
  
  If the source ledger is not defined, you will need to create or assign a source ledger to the migration plan.
  This can typically be done in the configuration settings for Financial Accounting under the migration settings.
  
  
  
  Review Migration Settings:
  
  Ensure that all necessary settings for the migration process are correctly configured.
  Check if the migration plan is active and properly linked to the relevant ledgers.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to the migration process to ensure that all prerequisites are met.
  
  
  
  Check for Notes and Updates:
  
  Look for any SAP Notes that may address this specific error or provide additional guidance on the migration process.
  
  
  
  Testing:
  
  After making the necessary changes, perform a test migration to verify that the error has been resolved.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as OBY6, FAGL_MIG, and others related to financial migration.
  SAP Notes: Search for SAP Notes related to migration issues, particularly those that mention FAGL_MIG128 or general migration troubleshooting.
  SAP Community: Engage with the SAP Community forums for insights and solutions shared by other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the cause of the FAGL_MIG128 error and implement the necessary solutions to resolve it.