Message type: E = Error
Message class:  FINS_FI_MIG - SAP S/4HANA Finance: Data Migration 
Message number: 002
Message text: NO FI-GL aggregates for ledger &1, company code &2 exist
There are no aggregates in FI-GL for ledger &v1& and company
code &V2& (for any fiscal year).
Existing aggregates from sub-ledgers will not be corrected to a balance
that is consistent with FI-GL as no such balance exists.
This is probably an issue that has to be investigated.
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.
The SAP error message FINS_FI_MIG002 indicates that there are no Financial Accounting General Ledger (FI-GL) aggregates available for the specified ledger and company code during a migration or data transfer process. This error typically arises in the context of financial data migration, especially when using tools like the SAP S/4HANA Migration Cockpit or during the transition from an older version of SAP to S/4HANA.
Cause: Missing Aggregates: The primary cause of this error is that the system does not have any aggregate data for the specified ledger and company code. This can happen if: The data has not been migrated yet. The aggregates were not created or were deleted. The configuration for the ledger or company code is incorrect. Incorrect Configuration: If the ledger or company code is not properly set up in the system, it may lead to the absence of aggregates. Data Migration Issues: If there were issues during the data migration process, it could
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