RE: EPSON TM-T20U installation
John,
Thanks for your reply. I tried all of the driver versions of the OPOS but none of them worked so far. So, I tried the Windows Advanced Printer Driver (APD) 5.0E version for EPSON TM-T20 (USB 2.0 Interface) printer and had some difficulty (Make sure you using the USB 2.0 port on your computer not the USB 3.0 since it may have some compatibility issue, and Uncheck the "Use Printer Offline" from Printer Menu) but finally it works. I think there is no need of installing and using the OPOS driver atleast for RMS since one can always use the "Windows" driver option in SO Manager. Since EPSON utility allows you to controll lots of the printing control right there including controlling the "Peripherals" (Mainly Cash Drawer for me), one can always use the utility OR "Printer Properties" and "Printer Preferences". I noted that you can actully set the LOGO from the "UTILITY" and don't have to even worry about print your compay logo from the RMS. This may resolve some of the printing related issue. Note that all of the work I have been doing is on Windows 8.1 Pro Platform and still in the testing phase.
P.S. I also used the TaoTronics Scanner which does not have to be installed but it works directly out of the box (Plug N Play). So far, I am done with Printer, Cash Drawer and Scanner. Next step is to install the weigh scale and customer pole display.
I would appreciate your response and also the others who posted the solutions to similar issue in other posts.
"Always Validate and Verify the solution provided here FIRST on testing enviornment before it goes to Production"
Pappu..