Generally if an FPS reports an error has been detected then will relate to an employee change within the current pay period. For example if you’ve added a new employee then a common reason for the error is that you’ve not set the normal no of working hours per week.

To check go into Employee Maintenance - <F7> on the warning message to bypass the ‘Payroll Has Already Been Run’ warning – and then choose the ALL option. Amend the employee that’s been added and check the status of the ‘Normal Hours Worked’ item.

If this is not the error then when you submit the FPS you’ve an option to ‘Print XML Output’ – set this to ‘Y’ and print the submission to the disk spooler. Inspect the print and search for ‘ERROR’ using the <F5> key to search and this should give you the value in error and can then scroll up to find the employee name/id.