M500 Always Fails
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I'm trying to do initial setup and calibration on my home-built Delta. Every time I try to issue an M500 command, I get this error message:
M500
Error: Operation failed (Reason: NullReferenceException in SimpleCode: Object reference not set to an instance of an object.)This is on a Duet 3 6HC with RPi4 and the latest stable updates. Everything else is working fine, and I can modify files manually to add the parameters, but M500 would save a whole ton of time through this tedious process. Searching Google yielded no results. I get the same error message whether I try to do it directly on the RPi4 (through the attached RPi display) or remotely from a web interface over the network.
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It would help to know what firmware version. If you're running from the pi running sudo apt update and sudo apt upgrade would be in order. Please send M122 and post the results to verify firmware version and some other info.
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I did that. That's what I meant when I said "the latest s6able updates".
M122 === Diagnostics === RepRapFirmware for Duet 3 MB6HC version 3.1.1 running on Duet 3 MB6HC v1.01 or later (SBC mode) Board ID: 08DJM-956L2-G43S8-6J9D2-3SJ6P-1A0LG Used output buffers: 1 of 40 (13 max) === RTOS === Static ram: 154604 Dynamic ram: 162536 of which 44 recycled Exception stack ram used: 224 Never used ram: 75808 Tasks: NETWORK(ready,1972) HEAT(blocked,1188) CanReceiv(suspended,3820) CanSender(suspended,1488) CanClock(blocked,1436) TMC(blocked,204) MAIN(running,4552) IDLE(ready,76) Owned mutexes: === Platform === Last reset 00:04:48 ago, cause: power up Last software reset at 2020-10-10 20:23, reason: User, spinning module LinuxInterface, available RAM 75696 bytes (slot 2) Software reset code 0x0010 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0444a000 BFAR 0x00000000 SP 0xffffffff Task MAIN Error status: 0 MCU temperature: min 30.6, current 32.7, max 32.8 Supply voltage: min 26.9, current 27.0, max 27.1, under voltage events: 0, over voltage events: 0, power good: yes 12V rail voltage: min 12.0, current 12.0, max 12.1, under voltage events: 0 Driver 0: standstill, reads 60081, writes 0 timeouts 0, SG min/max not available Driver 1: standstill, reads 60081, writes 0 timeouts 0, SG min/max not available Driver 2: standstill, reads 60081, writes 0 timeouts 0, SG min/max not available Driver 3: standstill, reads 60081, writes 0 timeouts 0, SG min/max not available Driver 4: standstill, reads 60081, writes 0 timeouts 0, SG min/max not available Driver 5: standstill, reads 60081, writes 0 timeouts 0, SG min/max not available Date/time: 2020-10-10 22:04:47 Slowest loop: 3.94ms; fastest: 0.21ms === Storage === Free file entries: 10 SD card 0 not detected, interface speed: 37.5MBytes/sec SD card longest read time 0.0ms, write time 0.0ms, max retries 0 === Move === Hiccups: 0(0), FreeDm: 375, MinFreeDm: 375, MaxWait: 0ms Bed compensation in use: none, comp offset 0.000 === MainDDARing === Scheduled moves: 0, completed moves: 0, StepErrors: 0, LaErrors: 0, Underruns: 0, 0 CDDA state: -1 === AuxDDARing === Scheduled moves: 0, completed moves: 0, StepErrors: 0, LaErrors: 0, Underruns: 0, 0 CDDA state: -1 === Heat === Bed heaters = 2 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1, chamberHeaters = 3 -1 -1 -1 Heater 1 is on, I-accum = 0.0 === GCodes === Segments left: 0 Movement lock held by null HTTP* is ready with "M122" in state(s) 0 Telnet is idle in state(s) 0 File is idle in state(s) 0 USB is idle in state(s) 0 Aux is idle in state(s) 0 Trigger* is idle in state(s) 0 Queue is idle in state(s) 0 LCD is idle in state(s) 0 SBC is idle in state(s) 0 Daemon* is idle in state(s) 0 Aux2 is idle in state(s) 0 Autopause is idle in state(s) 0 Code queue is empty. === Network === Slowest loop: 0.47ms; fastest: 0.01ms Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0), 0 sessions Telnet(0), 0 sessions HTTP sessions: 0 of 8 - Ethernet - State: disabled Error counts: 0 0 0 0 0 Socket states: 0 0 0 0 0 0 0 0 === CAN === Messages sent 901, longest wait 0ms for type 0 === Linux interface === State: 0, failed transfers: 0 Last transfer: 17ms ago RX/TX seq numbers: 8255/8256 SPI underruns 0, overruns 0 Number of disconnects: 0 Buffer RX/TX: 0/0-0 === Duet Control Server === Duet Control Server v3.1.1 Code buffer space: 4096 Configured SPI speed: 8000000 Hz Full transfers per second: 31.83 -
No help with this? It's still plaguing me.
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Waiting for @chrishamm to take a look.
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2 things i see from the m122.
I could be totally wrong as I don't have a RPI4 to test. I run mine in standalone.
First, in the initial line, it says SBC mode. Should it not show the other mode? RPI mode?)Second, it says SD Card 0 not detected. Isn't M500 trying to write configoverride.g on the SD card? (again, could be wrong in the RPI mode) -
nevermind, I just read some more and SBC (I thought SBC standed for single board computer aka standalone mode, I was wrong) is the RPi mode and the SD card isn't supposed to be in for the RPi mode.
Railcore II 300ZL with lots of upgrades (Duet 3 6HC)
Heavily modified Ender 3 Pro (Duet 3 6HC)
Heavily modified Tronxy X5SA-500 Pro with Chimera+ and dual bondtech (Duet 3 6HC)
CR-10S Pro V2 (Duet 3 Mini 5+)
and a bunch of SLA printers.. -
I tried re-imaging the micro SD card with a downloaded image of the OS (rather than the one that came pre-loaded on the card). The OS from the downloaded image looks very different. It uses a different desktop environment, and it presents me with a setup wizard on first boot for configuring location, networking, password and initial updates. The pre-loaded image never did that.
However I still can't run M500 without getting the error message listed above. I'm not sure what I'm doing wrong.
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Yes the latest image is based of an updated version of the recent pi image, so it's a bit more polished.
Did you do a sudo apt update sudo apt upgrade after?
Can you try capturing some extended debug information?
https://duet3d.dozuki.com/Wiki/Getting_Started_With_Duet_3#Section_Monitoring_optional
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@Thalios said in M500 Always Fails:
I thought SBC standed for single board computer
that bit is correct, but its the Pi and not the Duet that is an SBC.
(I suppose you could argue PanelDue is a graphics port and the Duet is a single board computer, but its commonly used for more general purpose computers like the Raspberry Pi, with the Duet being a specialized embedded computer
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@Phaedrux Yes, I made sure all packages were up to date and I rebooted. Here's a log output when I try to run M500:
Oct 16 18:05:08 duet3 DuetControlServer[1464]: [error] Code M500 has thrown an exception Oct 16 18:05:08 duet3 DuetControlServer[1464]: System.NullReferenceException: Object reference not set to an instance of an object. Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetControlServer.Files.ConfigOverride.WriteModelParameters(StreamWriter writer) in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetControlServer/Files/ConfigOverride.cs:line 77 Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetControlServer.Files.ConfigOverride.Save(Code code) in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetControlServer/Files/ConfigOverride.cs:line 34 Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetControlServer.Codes.MCodes.Process(Code code) in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetControlServer/Codes/MCodes.cs:line 652 Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetControlServer.Commands.Code.ProcessInternally() in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetControlServer/Commands/Code.cs:line 479 Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetControlServer.Commands.Code.Process() in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetControlServer/Commands/Code.cs:line 400 Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetControlServer.Commands.Code.ExecuteInternally() in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetControlServer/Commands/Code.cs:line 336 Oct 16 18:05:08 duet3 DuetControlServer[1464]: [error] IPC#46: Failed to execute SimpleCode Oct 16 18:05:08 duet3 DuetControlServer[1464]: System.NullReferenceException: Object reference not set to an instance of an object. Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetControlServer.Files.ConfigOverride.WriteModelParameters(StreamWriter writer) in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetControlServer/Files/ConfigOverride.cs:line 77 Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetControlServer.Files.ConfigOverride.Save(Code code) in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetControlServer/Files/ConfigOverride.cs:line 34 Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetControlServer.Codes.MCodes.Process(Code code) in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetControlServer/Codes/MCodes.cs:line 652 Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetControlServer.Commands.Code.ProcessInternally() in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetControlServer/Commands/Code.cs:line 479 Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetControlServer.Commands.Code.Process() in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetControlServer/Commands/Code.cs:line 400 Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetControlServer.Commands.Code.ExecuteInternally() in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetControlServer/Commands/Code.cs:line 336 Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetControlServer.Commands.Code.ExecuteInternally() in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetControlServer/Commands/Code.cs:line 383 Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetControlServer.Commands.Code.<Execute>b__27_0(Task`1 task) in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetControlServer/Commands/Code.cs:line 277 Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetControlServer.Commands.SimpleCode.Execute() in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetControlServer/Commands/SimpleCode.cs:line 136 Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetAPI.Commands.Command`1.Invoke() in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetAPI/Commands/BaseCommand.cs:line 67 Oct 16 18:05:08 duet3 DuetControlServer[1464]: at DuetControlServer.IPC.Processors.Command.Process() in /home/christian/Duet3D/DuetSoftwareFramework/src/DuetControlServer/IPC/Processors/Command.cs:line 63 -
Is there some other kind of official support medium than this forum? Because I spent a lot of money on these control boards and I really don't think I'm trying to do anything fancy or outside of reasonable use. It's literally been over a week now.
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@GoremanX said in M500 Always Fails:
Is there some other kind of official support medium than this forum?
This is "it", the developers do frequent the forum, but what you seem to be after seems to be "officially" not supported
https://duet3d.dozuki.com/Wiki/RepRapFirmware_3_overview#Section_M500
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@bearer Thank you!
That would've been nice to know right off the bat. Especially since none of the guides take it into account. Seems like I could've saved a whole lot of head-banging if that had been cleared up immediately.
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Also, that's a super bizarre omission that makes no sense at all. I hope it gets rectified soon. Having only M500 and M501 not work in SBC mode is seriously odd
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It boils down to differences in the virtual sd card used on the pi which isn't fully compatible with the code that uses the real sd card when in stand alone mode.
I think it was scheduled for 3.2 but haven't kept up with stuff lately (also, its possible the Wiki is out of date, but it doesn't work odds are its still at thing)
Edit: Calling it an omission isn't quite fair, is clearly been on display in the bottom of a locked filing cabinet stuck in a disused lavatory with a sign on the door saying ‘Beware of the Leopard.”
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Do you need any of the features the Pi offers? Might be better to switch to stand alone mode where M500 is supported while they implement the filesystem support for the SBC mode? The Pi/SBC doesn't really offer much at the present?
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@bearer The main thing it gives me right now is the ability to have the Pi 4 outside of the electronics enclosure, which gives me functional wifi without requiring any additional adapters (the base of my delta printer is all aluminum). I also have it hooked up to a Pi touchscreen, which gives me a much more complete interface at the printer itself, rather than the limited interface of a PanelDue. Plus I have a Bluetooth keyboard and touchpad paired, which has been convenient. And having the Pi 4 right there makes it super simple to have a camera hooked up for monitoring progress and/or capturing time lapses. Honestly, I'm loving the SBC thing compared to my other Duet-powered setups. If it's only the lack of M500, I'll deal with that until it's fixed. I just wish I hadn't wasted a week on trying to resolve this.
I haven't seen any mention of M500 or M501 in the recent 3.2 beta fixes and changes, so it doesn't look like it'll be making it into this release.
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If you replace the ribbon cable with ethernet and stick an sd-card in the duet, you can use the pi to bridge ethernet to wifi and keep using the screen to access DWC running on the duet's ethernet interface. Should -give you the same-ish functionality + M500 while the devs fix the file system stuff that is missing
(edit: suppose you don't have to remove the ribbon cable actually, it can supply power or just sit there unused as long as the Duet has a sd-card with a config file it will ignore the SBC interface afaik)
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I don't want to spend more money on an ethernet bridge. Pi4s and touchscreens I have littered about the workshop practically for free
All I need to do is put my heater autotune parameters and delta auto-configure results manually in config.g. I run auto-config before every print anyways. I can't think of anything else I use M500 for. It's only tedious initially because of the initial configuration which requires adjusting those settings multiple times until I zero in on the right ones.
