Message type: E = Error
Message class:  CNV_20211_CHECK - Messages for check functions (company conversion) 
Message number: 102
Message text: Company &1 uses FI-SL Ledger &2
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The SAP error message CNV_20211_CHECK102 typically occurs during the data migration process, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that there is an inconsistency or issue related to the Financial Accounting (FI) Special Ledger (FI-SL) configuration for a specific company code and ledger.
Cause: The error message CNV_20211_CHECK102 is triggered when: The specified company code (&1) is not properly configured to use the specified FI-SL ledger (&2). There may be missing or incorrect settings in the configuration of the FI-SL ledger for the company code. The ledger might not be activated or assigned correctly to the company code in the system.
Solution: To resolve this error, you can follow these steps: Check Configuration: Go to the SAP Easy Access screen and navigate to the configuration for Financial Accounting. Check the settings for the company code and ensure that the FI-SL ledger is correctly assigned. Verify Ledger Assignment: Use transaction code OB22 to check
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