Gcode not compatible error - General discussion, announcements and releases

RE: Gcode not compatible error

nfa-prusa — Mon, 01 Dec 2025 15:38:24 +0000

Hopefully this saves time for someone who is in a similar situtation as I was. I have the MK4S with mmu3. The issue I had was that the mmu3 unit somehow got disabled in settings. I had to reenable by Settings > MMU Unit (toggle to enabled), and everything worked fine. Unfortunately before I thought to check that, I followed some weird rabbit holes.

RE: Gcode not compatible error

avrorafrix — Sun, 27 Apr 2025 12:16:58 +0000

You're not alone — I've seen a few people mention the same issue after upgrading. It’s odd when it prints fine but still throws up warnings; definitely feels like something minor between slicer settings and firmware versions.

RE: Gcode not compatible error

Bobster — Thu, 17 Apr 2025 09:55:56 +0000

I only just had this error, your solution worked first time. Thankyou.

RE: Gcode not compatible error

3dtony — Thu, 26 Sep 2024 22:26:13 +0000

Thanks to all for the tips currently away from “farm” will have a delve into the firmware when I return

RE: Gcode not compatible error

Studer Austria GmbH — Thu, 26 Sep 2024 21:02:46 +0000

It's quite simple and caused by the hardware setting of the Mk4 . you have to change the hardware settings in the printers menu ( not the slicer) from MK4 to Mk4S .

RE: Gcode not compatible error

TeamD3dp — Tue, 17 Sep 2024 13:21:57 +0000

I would assume this has to do with the selected printer profile or presets indicating Mk4 when the printer firmware is saying Mk4S. I would double check all of your slicer settings and make sure the presets and names of your physical printer have been updated. I didn't have a problem when I upgraded mine, but I DID get that message when I tried sending a model from Orca Slicer and assumed it was because there isn't yet an Mk4S profile there and the printer name remains Mk4. I somewhat wonder if this is a very simplistic printer name check for people with multiple types of Prusa's, and is simply to make sure you're not sending Mk4 jobs to a Mini, for example. This is just a guess though, as I haven't specifically tested this.

Gcode not compatible error

3dtony — Fri, 13 Sep 2024 10:14:15 +0000

having just finished upggrading to 4s i have had numerous error messages thrown up by prusa slicer and the printer firmware I have managed to clear most of them but cannot get rid of "gcode not comppatible" which seems odd as it was sliced by prusaslicer! If i choose to override the warning and print anyway it prints fine. Has anaybody else this problem?