Message type: E = Error
Message class:  CNV_20100 - Messageclass for chart of account conversion 
Message number: 344
Message text: There is no old set data
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The SAP error message CNV_20100344, which states "There is no old set data," typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that the system is unable to find the required old set data that is necessary for the migration or conversion process.
Cause: Missing Data: The old set data that the migration process expects is not available in the source system. This could be due to incomplete data extraction or data not being present in the source tables. Incorrect Configuration: The migration settings or parameters may not be correctly configured, leading to the system looking for data that does not exist. Data Mapping Issues: There may be issues with how the data is mapped from the old system to the new system, causing the migration tool to fail in finding the necessary data. Version Compatibility: The version of the
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