When you click this button on the View History/Generate Report tab of the International Students and Exchange Visitors window, the information in the SEVIS current tables is compared with the information in the SEVIS history tables for a selected report date (Next Reporting Date).
Each time this process is run, the system clears the SEVIS transaction tables and generates rows for the differences since the last report.
The Errors Report and the SEVIS Update Report provide the only display of the data processed during the Compare process. The Errors Report displays information about data for which there is change but for which a transaction cannot be generated. The SEVIS Update Report displays the data that can be successfully reported or changes since the last SEVIS report.