#4 usbfs did not claim if before use

[Henry]

Using Sunnybeamtool to read out sunnybeam over Rasperry Pi USB port.

I get lot of errors in dmesg which doesn't affect the working (apparently) program is written in C.

Messages:
[30563.867756] usb 1-1.3.3: usbfs: process 32327 (sunnybeamtool) did not claim interface 0 before use [30563.938025] usb 1-1.3.3: usbfs: process 32327 (sunnybeamtool) did not claim interface 0 before use

Hoe do I get rid of these messages?