Java recently released an update. The latest version of Java is Version 7 Update 45. You will likely see the pop-up message displayed in image 1 below when you attempt to print a receipt on a receipt printer, if you have not updated to the latest version of Java. If you are receiving this message, please follow the link in the message and update your version of Java. Or, go to http://www.java.com/en/download/installed.jsphttp://www.java.com/en/download/installed.jsp to determine the version of Java your computer is using, and update to the latest version from there.
If you do not have admin permissions on your computer, you will need to contact your computer admin in order to have them make these changes.
Once you have updated to Java 7 Update 45, you may see the pop-up message displayed in image 2 below when you attempt to print a receipt on a receipt printer. If you receive this message, you will want to click Allow/Don't Block and you shouldn’t receive the message again.
NOTE THAT THESE SCREEN SHOTS ARE BROWSER/OPERATING SYSTEM SPECIFIC AND MAY VARY.