How To Fix FINS_ML_MIG004 - Material Ledger (= MLMAA-flag) is not active for the following entries:

SAP Error Message - Details

• Message type: E = Error

• Message class: FINS_ML_MIG - Messages for S/4HANA Material Ledger Migration

• Message number: 004

• Message text: Material Ledger (= MLMAA-flag) is not active for the following entries:

MLMAA flag (= Material Ledger active flag at plant level) has not been
set, because for instance no MARA table entry exists (for instance due
to inconsistencies or archiving) or the quantity or value indicator
entry is missing in table T134M for the corresponding valuation area.
(Relationship: MARA-MTART = T134M-MTART for specific BWKEY ).
Consequence: Corresponding xBEW(H) (= MBEW(H), EBEW(H), QBEW(H), OBEW(H)
) entries might have not been migrated (Fields LBKUM and SALK3 are
initial).
In addition, probably no Material Ledger master records have been
created in tables CKMLHD, CKMLPR, CKMLPP and CKMLCR.
The message can be ignored, if LBKUM and SALK3 are initial even in the
original xBEW(H) tables (= MBVMBEW(H)OLD, MBVEBEW(H)OLD, MBVQBEW(H)OLD,
MBVOBEW(H)OLD ) and it is not planned to use these records in the future
for logistics processes, such as goods movements.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FINS_ML_MIG004 - Material Ledger (= MLMAA-flag) is not active for the following entries: ?

  The SAP error message FINS_ML_MIG004 indicates that the Material Ledger (ML) is not active for certain entries in your system. This typically occurs during processes that require the Material Ledger to be active, such as during the migration of data or when performing certain financial transactions.
  Cause:
  The error arises when:
  
  The Material Ledger is not activated for the company code or plant in question.
  The entries being processed (e.g., materials, documents) are not set up to use the Material Ledger.
  The configuration settings for the Material Ledger are incomplete or incorrect.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Material Ledger Activation:
  
  Go to the transaction code OBY6 (or use the path: SPRO > Financial Accounting > Financial Accounting Global Settings > Activate Material Ledger).
  Ensure that the Material Ledger is activated for the relevant company code and plant.
  
  
  
  Verify Material Master Settings:
  
  Use transaction code MM03 to check the material master records for the materials in question.
  Ensure that the Material Ledger is enabled in the accounting view of the material master.
  
  
  
  Review Configuration:
  
  Check the configuration settings for the Material Ledger in SPRO. Ensure that all necessary settings are correctly configured.
  Make sure that the MLMAA flag is set appropriately for the materials and that the necessary settings for currency and valuation are in place.
  
  
  
  Check Migration Settings:
  
  If this error occurs during a migration process, ensure that the migration settings are correctly defined and that the necessary prerequisites for activating the Material Ledger are met.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or notes related to the Material Ledger and the specific error message for any additional guidance or troubleshooting steps.
  
  
  
  Contact SAP Support:
  
  If the issue persists after checking the above points, consider reaching out to SAP support for further assistance.
  
  
  
  Related Information:
  
  Material Ledger (ML): A sub-ledger in SAP that allows for the management of inventory valuation and provides detailed information on material movements and costs.
  MLMAA Flag: This flag indicates whether the Material Ledger is active for a specific material and is crucial for proper financial reporting and inventory management.
  Transaction Codes:
  
  OBY6: Activate Material Ledger
  MM03: Display Material Master
  SPRO: Customizing Implementation Guide
  
  
  
  By following these steps, you should be able to identify and resolve the issue related to the FINS_ML_MIG004 error message.