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Hi,

Unless you're logged in a root then you will not have permission to write to the /dev/bus/usb/001/002 device.

I've just worked around this and it's a bit messy and you have to do it every time you connect the camera. Change your path to /dev/bus/usb/001/ and type "sudo chown <your username=""> 002"

This will give your user the permissions to access this device.

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