IPL in the PX4ie printer is now a Fingerprint program, that is, it receives an IPL data stream and converts it to Direct Protocol before printing a label. Some of the older IPL configuration commands are not supported. Loftware is famous for sending down a lots of these commands with their label data and some of these can cause problems with the PX4ie.
The way to get around this is to turn on the ignore commands feature in the printer.
Browse to the printer’s IP address and click on Configure on the left side of the screen.
Next, click on Languages and enter “itadmin” and “pass” for the user name and password and press the login button. Click on Languages again, then IPL.
The second to last selection from the bottom is the Commands Ignore. Enable this, save it, reboot the printer and try your Loftware label again, it should now print.