warning: received malformed responses

[R006]

Hi,

I’m using a Duet 3 MB6HC running RepRapFirmware 3.6.0-rc2, and I’m encountering a "malformed responses" warning after repeatedly using the Resume After Power Failure (APF) function.
Under normal conditions, the warning does not appear. However, after resuming from APF multiple times, the warning is consistently displayed — though it does not appear to affect any functionality.

Could you please advise on what might be causing this issue?

Any suggestions would be greatly appreciated.
@dc42 @Phaedrux

Thanks,

[dc42]

@R006 :

1. Where are the "malformed responses" warnings coming from? DWC, or something else?
2. Are you running the Duet in standalone or SBC mode?
3. Please upgrade to firmware 3.6.0-rc.3.

[R006]

@dc42 said in warning: received malformed responses:

@R006 :

1. Where are the "malformed responses" warnings coming from? DWC, or something else?

On panel

2. Are you running the Duet in standalone or SBC mode?

standalone mode

3. Please upgrade to firmware 3.6.0-rc.3.

Okay, but could you please clarify why this warning appears?
Is it possibly related to cabling, signal integrity, or something else?
I’ve read "https://forum.duet3d.com/topic/32837/malformed-responses-warnings-on-paneldue-7i?_=1746789074093", and it seems to describe the same issue I’m experiencing — so I suspect it might be related.
Any insights would be appreciated.

[dc42]

@R006 which version of PanelDueFirmware are you using? RRF 3.6 requires version 3.5.1. The "malformed responses" messages may occur because you are using an older version.

If you are already running version 3.5.1 then it's probably a signal integrity issue. This is typically caused by running the PanelDue wires close to stepper motor cables.

[R006]

@dc42 said in warning: received malformed responses:

@R006 which version of PanelDueFirmware are you using? RRF 3.6 requires version 3.5.1. The "malformed responses" messages may occur because you are using an older version.

Panel version is 3.4.1, but this warning appears after resume APF only, in normal printing this warning is not appears.