Hello! I had installed sick tim package and executed the instruction inside the file README, placed in Udev folder. I have the files because i downloaded all sick tim package files. However i can rid of the mistakes:

libsub couldn't open USB device /dev/bus/usb/001/002: Permission denied
libsub requires write access to USB device nodes
[ERROR] LIBSUB - Cannot open device; please read sick_tim/udev/README
[FATAL] Failed to Init device: 1

I copy 81-sick-tim3xx.rules, which is part of downloaded files.

Please give me an advise how to solve the problems...