Why has a payslip not been automatically generated for the current open run?
If the employee's "Pay Package Automatically" indicator is disabled on the Pay Rate Details screen, it will not automatically generate a payslip for the current open run.
Navigate > Employee > Payroll Processing > Pay Rate Details
In order to add a payslip to the employee's record select the "+payslip" button on the Edit Payslip screen. Then select the run for which which the payslip must be created.
Navigate > Employee > Payroll Processing > Edit Payslip