Message type: E = Error
Message class:  CNV_20100 - Messageclass for chart of account conversion 
Message number: 517
Message text: Reset of confirmation was successful
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
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The SAP error message "CNV_20100517 Reset of confirmation was successful" is not actually an error message in the traditional sense; rather, it is an informational message indicating that a reset of a confirmation process has been successfully completed. This message is typically associated with data migration or conversion processes, particularly in the context of SAP's data migration tools.
Cause: The message is generated during a data migration or conversion process when a confirmation that was previously set (for example, confirming the completion of a data migration step) has been reset. This could happen for various reasons, such as: A manual intervention to reset the confirmation. A requirement to reprocess certain data due to errors or changes in the data. A part of a larger data migration strategy where certain steps need to be repeated.
Solution: Since this message indicates a successful reset rather than an error, no specific corrective action is typically required. However, if you are
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