Prusa-firmware-buddy: [BUG] Printing crashed with message: webServerTask

[drakor007]

Printer type - [MINI]

Printer firmware version- [4.2.0 finall]

Original or Custom firmware [Original]

Optional upgrades - [Filament Runout Sensor]

USB drive or USB/Octoprint
print via USB flash drive

Describe the bug

Print crash approx. after 17hours

see for more details:

https://forum.prusaprinters.org/forum/hardware-firmware-and-software-help/printing-crashed-with-message-webservertask-precise-data-access-error-precise-bot-any-ideas/

https://forum.prusaprinters.org/forum/hardware-firmware-a-software-pomoc/error-screen-po-17h-tisku/

[JohnnyDeer]

Hi @drakor007, thank you for reporting.

[loveolsson]

I had the same issue, with the same version, also printing from USB, but died after ~4h.

[JohnnyDeer]

@loveolsson could you upload crash dump please?

[Nosepicker2112]

[Nosepicker2112]

^^^ crash load dump --> extrapolted from bin to notepad-->
G1 X157.713 Y107.263 E0.00530
G1 X157.733 Y107.444 E0.00324
G1 X157.706 Y107.721 E0.00495
G1 X157.558 Y107.993 E0.00552
G1 X157.371 Y108.117 E0.00401
M204 S1250
G1 X157.175 Y108.040 F9000.000
G1 E-1.40000 F4200.00000
G1 F7200.000
G1 X157.141 Y108.183 E-0.13235
G1 X156.916 Y108.117 E-0.12976
G1 X156.729 Y107.946 E-0.14045
G1 X156.688 Y107.856 E-0.05490
G1 X156.642 Y107.658 E-0.11254
G1 E-0.03000 F4200.00000
G1 Z121.300 F9000.000
G1 X158.600 Y105.035
G1 Z120.800
G1 E2.00000 F2400.00000
M204 S800
G1 F1500.000

[Nosepicker2112]

dump - Copy.zip

[OptionMan]

I had the same issue, with the same version, also printing from USB, but died after ~2h.

[fuelflo]

Hey, I also got a crash while printing, roughly after 2hrs, on the 4.2.0 firmware. Network connection enabled. filament sensor, english language enabled.

But as I can see, there are a few different error messages. So I'm not sure if I was supposed to create a new issue.

Mine was:

webServerTask, Illegal unaligned load or store

Is it safe to just flash firmware 4.1.0 on top of 4.2.0 in order to be able to continue printing until it's fixed?

[Nosepicker2112]

I have raised the issue with prusa. Presently exchanging info.... Their initial direction is to re-flash the firmware and then do a factory reset. Then run a test print. Sucks thou because seems like the crashes come on after hours and hours..... That is all I have ATT.

[LittleJono]

I'm also getting this error with 4.2.0. I'm downgrading back to 4.1.0 to see if it fixes it.

[schluppy]

dump.zip
I had the same issue twice. Is there anything I can do to help to find the bug? The prusa mini is my first 3d printer, and it's sad with these malfunctions.

Dump-File is added.

[JohnnyDeer]

Many thanks to all for Dumps. We are working on this issue with high priority.

[ghnu]

So what to do now? How long Prusa needs to fix that?

Since I like to continue to print: Better downgrade to 4.1.0?

[JohnnyDeer]

@ghnu yes you rather downgrade to 4.1.0. Unfortunately no one can tell any date but it will take few weeks I think.

[schluppy]

@ghnu I have no problems if the network cable is not plugged in. My last print run lasted 36 hours.

[mlcdev]

Same error here, bluescreen and webServerTask. I have LAN enabled but no cable plugged in. Also got the Filament Sensor option enabled. I disabled LAN for now, maybe it helps? See my dump file attached.

dump.zip

[drakor007]

So, a workaround could be: disable LAN & unplug LAN cable?

[schluppy]

So, a workaround could be: disable LAN & unplug LAN cable?

It works for me. LAN cable unplugged. I haven't had a crash since. I'd run a project for 38 hours without any issues since I unplugged the cable.

[adynis]

After about 30h of printing (and about 300g of Prusament Pistacho Green ) this happend ...
:(
The interesting coincidence was that this happened exactly when I started my PC and Windows loaded (both PC and MINI are connected to the same router ....)

Probably I will dissconnect it from the LAN until next firmware ...

PD. dump.zip attached .. if more info is needed...

dump.zip

[drakor007]

may be .... https://github.com/prusa3d/Prusa-Firmware-Buddy/pull/835

[mweisshaupt1988]

Just had this happen too. My Mini is not connected to a network, but it was once because I wanted to try out the web ui.

[adamhovorka]

Adding my dump. Printing from USB, neither Ethernet nor ESP plugged in at all, about halfway through a large print.

[rtyr]

New firmware version fixing BSOD issues. https://github.com/prusa3d/Prusa-Firmware-Buddy/releases/tag/v4.2.1

[JohnnyDeer]

If there isn't more BSOD cases I´ll close this issue soon. Please leave comment here if anyone will have BSOD on 4.2.1.