...
An exception report is generated and saved with a Timesheet Import batch whenever a batch completes processing successfully and one or more timesheet exceptions were encountered during the processing of the batch. That is, an exception report is generated for a batch if the final status of the batch is Completed with Exceptions. An exception report is also generated for a Timesheet Import batch if there are no exception errors in the import file, and therefore the status of the batch is Completed, but there are one or more leave request warnings.
A timesheet exception occurs when Timesheet Import is unable to create a timesheet or timesheet item based on the data contained in a row of the import file. For example, if a row in the import file references a job order number that does not exist then it will not be possible to create the corresponding timesheet or timesheet item. In such cases, the corresponding timesheet is not created and the offending row, and all other rows in the import file that correspond to the same timesheet, are written to the exception report.
...