Try and print a report, then look at the log file located at "%USERPROFILE%\My Documents\SambaPOS5\log.txt" and see if there are any exceptions at the end of the file; if so post it here.
Try and print a report, then look at the log file located at "%USERPROFILE%\My Documents\SambaPOS5\log.txt" and see if there are any exceptions at the end of the file; if so post it here.