How To Fix FAGL_MIG258 - Account determination &1 has not been defined in Customizing

FAGL_MIG258 - Overview

• Message type: E = Error

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

• Message number: 258

• Message text: Account determination &1 has not been defined in Customizing

Self-Explanatory Message

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FAGL_MIG258 - Details

• The SAP error message FAGL_MIG258 indicates that there is an issue with account determination in the context of the migration to the new General Ledger (G/L) accounting. Specifically, it means that a required account determination for a specific account has not been defined in the system's Customizing settings.
  
  Cause:
  The error typically arises during the migration process when the system attempts to map accounts from the old G/L structure to the new one, but it cannot find the necessary configuration for a specific account. This can happen due to:
  
  Missing Configuration: The account determination for the specified account has not been set up in the Customizing settings.
  Incorrect Mapping: The mapping between the old and new accounts is not correctly defined.
  Incomplete Migration Preparation: The migration process may not have been fully prepared, leading to missing configurations.
  
  
  Solution:
  To resolve the FAGL_MIG258 error, follow these steps:
  
  
  Check Customizing Settings:
  
  Go to the SAP Customizing Implementation Guide (IMG) and navigate