How To Fix FAGL_MIG026 - Error during validation: Field &1 incorrectly filled

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 026

• Message text: Error during validation: Field &1 incorrectly filled

What causes this issue?

In BAdI <ZK>FAGL_MIGR_SUBST</>, you have changed a field so that the
function module <ZK>K_COBL_CHECK</> has changed the content of a field
that was already filled before the BAdI was called. Such a field change
is not permitted. Fields that are already filled may <ZH>not </>be
changed.
You may only replace dummy profit centers.

System Response

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

How to fix this error?

Check the BAdI <ZK>FAGL_MIGR_SUBST</>.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FAGL_MIG026 - Error during validation: Field &1 incorrectly filled ?

  The SAP error message FAGL_MIG026 typically occurs during the migration process when using the New General Ledger (New GL) functionality. This error indicates that there is an issue with the data being validated, specifically that a certain field (denoted by &1) is incorrectly filled or does not meet the required criteria.
  Cause:
  The error can be caused by several factors, including:
  
  Incorrect Data Format: The data in the specified field may not conform to the expected format (e.g., numeric values where text is expected).
  Missing Required Fields: Certain mandatory fields may not have been filled in during the migration process.
  Inconsistent Data: The data being migrated may not be consistent with the existing data in the system, leading to validation failures.
  Configuration Issues: There may be configuration settings in the New GL that are not aligned with the data being migrated.
  
  Solution:
  To resolve the FAGL_MIG026 error, you can take the following steps:
  
  Check the Error Message Details: Look at the specific field indicated by &1 in the error message. This will give you a clue about which field is causing the issue.
  Validate Data: Review the data being migrated for the specified field. Ensure that it adheres to the expected format and that all required fields are filled.
  Use Migration Tools: If you are using a migration tool (like the Migration Cockpit), ensure that you are following the correct steps and that the data mapping is accurate.
  Review Configuration: Check the configuration settings in the New GL to ensure they are set up correctly and are compatible with the data being migrated.
  Consult Documentation: Refer to SAP documentation or notes related to the migration process for any specific requirements or known issues.
  Test Migration in a Sandbox: If possible, perform the migration in a test environment to identify and resolve issues before executing in the production environment.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  Transaction Codes: Familiarize yourself with transaction codes related to New GL migration, such as FAGL_MIGRATE, to help troubleshoot and manage the migration process.
  Community Forums: Engage with SAP community forums or support channels for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the root cause of the FAGL_MIG026 error and implement a solution to successfully complete the migration process.