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How to fix Epson printer error ERR_ILLEGAL on Nomni POS

Step-by-step checks when Nomni POS shows ERR_ILLEGAL for an Epson printer

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Written by Lucien Hopkinson

Quick answer: Check the printer is on, has paper and the cover is closed. Turn the printer off, wait 10 seconds and turn it on. Then follow the steps below.

ERR_ILLEGAL is an error from the Epson printer software. It means the printer refused the print request. It usually clears when the printer is reconnected.

Fix it

  1. Check the printer is on, has paper and the cover is closed.

  2. Turn the printer off, wait 10 seconds and turn it on.

  3. On the Master POS, open the printer list. Turn the printer's switch off and on again.

  4. Tap the gear icon and tap PRINT to test.

  5. If it still fails, remove the printer from the list and add it again.

What you should see: a test print and no ERR_ILLEGAL message.

If something goes wrong

Find your Device Register Code

Follow these steps:

  1. Open the drop-down menu on Nomni POS.

  2. Tap Settings.

  3. Tap Device Options.

  4. Find Device Register Code.

  5. Send the code to Nomni Support in the chat or by email.

Full guide: Device Register Code.

Need help?

Email support@nomni.ai or message us from the chat in Nomni Console. Tell us your venue name, the device and what you have already tried.

You can also call 1300 445 483.

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