Error 0500-400B

[user_810474412]

Yesterday, the ability to send print jobs from Bambu Handy, Bambu Studio, and LAN mode stopped working on two of my A1’s. The process stops at the download stage, and then error 0500-400B appears. Decoding the error does not lead to anything. I tried another router, tried a mobile hotspot, another SD card, tried downgrade. Nothing helps, but I’ll point out that this issue is on both printers. So it’s not about the sd card, for example. I can send a file from Bambo Studio to the sd card itself and select a file on the printer and start printing, I can see through the camera, I can control the printer, but I can’t print directly from either Bambu Studio or Bambu Handy, so as not to approach the printer

[JonRaymond]

Seems very similar to this issue.

Can no longer print from Printing History

Hi there, As I run a small online print business in my spare time part of my workflow is just printing the same dozen or so prints over and over and I have always done so from the printing history of the Babu Handy app. However a couple of days ago it just stopped working. I have 2 P1S printers each with an AMS and it stopped working with both at the same time. It goes through the motions of sending the jobs and starts to download them but then says “There was a problem downloading a file. Ple…

[user_810474412]

@JonRaymond

Seems very similar to this issue.

Thanks, there’s the same error in that topic, they suggested formatting the sd card, I tried that too.

[user_1712002503]

Hi! I have the same problem on my p1s printers. I also tried changing the router, turning on and off the vpn. It didn’t help! These printers just turned into a pumpkin.

[user_4194635642]

any luck in a solution concerning failed downloads, I too have the same issue

[user_810474412]

So far, the following has been replied to me in support:

It’s possible that access to the cloud service is restricted.
We will report this issue to the relevant department for further investigation.

[Kodiac1]

Hi All, I have had this issues a few times. the only way I know how to fix it is to unpair your printer to the slicer and log out of your account. repair using the PIN and you should be good go to.

[user_1712002503]

No. It doesn’t help. The problem is most likely in the router. I took the printer to a friend and connected everything there. The cloud started working.

[user_1712002503]

What country are you in? Do you access the internet via a 4G modem?

[Vor4un]

There was a problem downloading a file. Please check your network connection and resend the print job.[0500-400B 095505]
Hi, I have such a mistake. Unplugging the printer and reconnecting it does not help. Connected to a router, the router is powered by 4G. I also connected it via the phone, the same problem.

[user_1712002503]

Are you in Russia? Is your operator Megafon or Yota?

[sciencepirate]

Looks like russian Megafon and Mts can’t resolve host for Bambu storage services. Everything is working except starting printing. Printing from slicer works only in lan mode

[Kodiac1]

I can’t agree with you that the router is to blame…! I have serval other devices on the 2.4ghz network and I don’t have any issues with any of them.? Again I have also tried it connected to a phone via 5g and it still comes back with the same error, Ive looked at the windows firewall rules and this is all set to allow… And this is irrelevant as prints have gone through so again I can’t see this being a router issue…

[glenn2]

Same situation with my A1. LAN downloads no longer auto print. You must start them from the file on the printer. Changed immediately after upgrade

[user_1712002503]

I was able to solve the problem. I am in Russia and use 4G for access, we can with the operator Yota. Blocking occurs at the level of mobile network operators. I installed a VPN on my Router and sent traffic to printers through the VPN. Everything worked.

[user_Mutley2133]

Did Bambu recently issue an update both with studio and firmware?
Mine went flaky till I reinstalled my router and reinitialized it reinserted it into the list - mines a 5G unit.
Going by what everyone is saying it points to the updates possibly?
It could also be down to that update screwing it all up, companies rarely never ever admit that it’s their fault, but it’s cured with the next update.
Old adage the more you add to a program the more can go wrong.
I hope you all get sorted…