Email addresses had been input into the details and bank section of employees in preparation of setup of Opera3 Email payslips - however this then prevented the printing of payslips this week.
Dialled on and extracted the csv file with already inputted email address (to save re input of these next week) and used the command line to amend the 'Use Email Payslips' on the employees to allow printed payslips to be produced for this week.