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Firmware 6.4.0: Not sliced for IS  

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Ian Harris
(@ian-harris)
Eminent Member
Firmware 6.4.0: Not sliced for IS

Updated one of my Mk4's to firmware 6.4.0 and tried a test print - now getting an information message that the file is not sliced for Input Shaping. 

How do I turn off this message on the printer? I do not use Input Shaping and none of the files I have are sliced for Input Shaping. 

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Ian

Posted : 27/11/2025 9:20 am
Ian Harris
(@ian-harris)
Eminent Member
Topic starter answered:
RE: Firmware 6.4.0: Not sliced for IS

OK, found the setting, need to change the gcode check for Input Shaping to 'None'. 

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Ian

Posted : 27/11/2025 9:34 am
TheWortLord
(@thewortlord)
Member
RE: Firmware 6.4.0: Not sliced for IS

I'm having the same issue. I also do not use IS 99% of the time. Is the setting you changed in the slicer or on the printer?

Posted : 29/11/2025 5:45 pm
Ian Harris
(@ian-harris)
Eminent Member
Topic starter answered:
RE: Firmware 6.4.0: Not sliced for IS

On the printer - Settings, Hardware, G-Code Checks, Input Shaper. Press knob to get to 'None', then Returns to get back to the home screen. 

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Ian

Posted : 29/11/2025 11:54 pm
TheWortLord
(@thewortlord)
Member
RE: Firmware 6.4.0: Not sliced for IS

Amazing, thank you!! This was driving me crazy!

Posted by: @ian-harris

On the printer - Settings, Hardware, G-Code Checks, Input Shaper. Press knob to get to 'None', then Returns to get back to the home screen. 

--

Ian

 

Posted : 30/11/2025 2:59 pm
loadinglevelone
(@loadinglevelone)
Trusted Member
RE: Firmware 6.4.0: Not sliced for IS

I'm curious, setting that setting to 'none' seems to only disable the warning - yet the warning says that the g-code is incompatible. Why warn us, if the code is in fact compatible?

My printers: Mk3s / Mk3s clone with +upgrdaes (you know SPinda and all that good stuff) / Mini+ / Ender 3 v2

Posted : 17/01/2026 9:23 pm
Evelien
(@evelien)
Member
RE: Firmware 6.4.0: Not sliced for IS

I am wondering the same. Why would my gcode suddenly be incompatible just because I updated the firmware?

I don't want to use IS because compared to the legacy profile it is LOUD on my Prusa Mini.

Posted : 28/01/2026 9:51 pm
dameion.d
(@dameion-d)
Active Member
RE: Firmware 6.4.0: Not sliced for IS

I'm amazed that the printer firmware and the slicer are not kept in sync, especially with Prusa Connect where the slicer knows the printer's setting. This should be an easy fix and not require users to modify their printer settings individually. 

Posted : 22/02/2026 6:38 am
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