RuntimeError: name too long

[skylin008]

I used pyboard and rebuild the micropython firmware , the micropython version is : v1.22. I usually used CTRL + D key reset the pboard to debug the python file, any show off error, how to solve this issue, thanks!

MPY: sync filesystems
MPY: soft reboot
RuntimeError: name too long
RuntimeError: name too long
MicroPython v1.22

[dpgeorge]

What code are you running in your boot.py and main.py files? There must be some code there that has a very long name. What files are on your pyboard's filesystem?

[tstenvold]

Your files are likely being corrupted due to a file write and then power loss. This results in the filesystem being intact, but the files are corrupted on the FAT partition.

My guess is you are doing a long write to the flash or SD card and then resetting the power during this write.