If you are getting a message that not all Pay Advices are printed, please follow these steps
Go to Payroll, Report, Transactions, Pay Advices.
Select All for Payroll Company, Location, Pay Point.
Leave From Employee and To Employee blank.
For Delivery Method select Employee Default.
Select Pay Frequency and Period End Date.
Click Preview, which will show the Pay Advice still to be produced.
Close the preview and click Produce.