Insufficient permissions, what file is the package accessing?

[fenimore]

Hi,
I'm trying to use this package, but I get an error: libusb: bad access [code -3]
I checked here, http://libusb.sourceforge.net/api-1.0/group__misc.html#ggab2323aa0f04bc22038e7e1740b2f29efa131f3c2f6f2bb40bc6fb60ccb6f3152f
the libusb docs, and I see that this bad access means I have insufficient permissions. I can't seem to find the file that libusb is trying to access. Normally I've been working with either: /dev/usb/hiddev0 or /dev/bus/usb/001/0XX, and that's where the device is connecting to my machine, but relaxing the permissions in these directories/files doesn't change this error code.

The device Path is like this 05f3:00ff:01.02, which is the Vendor and Product numbers, (with two other bits I don't know are about), is this 'path' what I should be looking into?

I'm running Arch Linux.

[boombuler]

@nitram509 @jsouthworth could any of you say something about it?

Btw which method did you call when you got the error?

[fenimore]

I'm calling Open() on device info.

[eddiewebb]

Also seeing this error also on write. If I sudo myapp I get error 9.

I found infohttps://askubuntu.com/questions/978552/how-to-make-libusb-work-as-non-root which suggests error 3 is permission issue and after applying it I get same error as if running the app as root.

added usb with path 0e53:2517:01.05 as index:0, ID: 1
libusb: pipe error [code -9]