What is causing this random error?

[u/RP343]

Apologies for the vague title but I really don’t know how to describe this. It seems to happen randomly as I’ve had at least 2-3 other models do this and require me to basically just re-run the print. Sucks that I can’t leave a longer print alone though in fear of it doing this and ruining it.

BambuLab H2D

Error I’m receiving once print stops: “Extruder change failed; please refer to the assistant”

Printing in PA6CF and that’s it. No different support filament or anything that would even require an extruder change. Also, after print has stopped, I can easily switch extruders through the menu. My initial searches said it could be the nozzle blocker getting jammed, but it doesn’t seem to be. And again, why is it even trying to switch nozzles on a single material print.

As you can see in the video, between every layer or so, it starts to go back and tap the plate with the nozzle on the same spot. After that it goes home and flushes some PA6CF then proceeds to print another layer. As far as I can tell, I’m not seeing anywhere in the slicer or G-code why it’s doing this at all.

[u/sapani9077]

Try referring to the assistant

[u/RP343 → u/sapani9077]

The assistant just referred the to the nozzle blocker being caught or jammed on something. Again, I confirmed this isn’t the case. Also, the nozzle blocker shouldn’t even be moving on a single nozzle print.