"failed to open this device: LIBUSB_ERROR_ACCESS" on ubuntu16.04, have tried some solutions - linux

Question

After searching for long time on internet I think there is no proper answer so I put up this problem. As being new here, I apology if I made any mistakes.
I have a tof camera connected to ubuntu16.04 through usb and a software to operate it. When I try to receive the image through software:
./smartTOFViewer
it gives these error repeatedly:
2018/07/06 20:27:20.297[3249948416][DBG] [dmcam_dev_open] open dmcam device # 0x7f8ab88e29c0
2018/07/06 20:27:20.297[3249948416][DBG] [_usb_ll_dev_open] create usb context
2018/07/06 20:27:20.300[3249948416][ERR] [dmcam_dev_open] open device failed!
2018/07/06 20:27:21.301[3249948416][DBG] [dmcam_dev_open] open dmcam device # 0x7f8ab88e29c0
2018/07/06 20:27:21.301[3249948416][DBG] [_usb_ll_dev_open] create usb context
2018/07/06 20:27:21.303[3249948416][ERR] [dmcam_dev_open] open device failed!
2018/07/06 20:27:22.304[3249948416][DBG] [dmcam_dev_open] open dmcam device # 0x7f8ab88e29c0
2018/07/06 20:27:22.304[3249948416][DBG] [_usb_ll_dev_open] create usb context
2018/07/06 20:27:22.307[3249948416][DBG] [_usb_ll_dev_open] found dmcam device (speed=3) # 001:002:020
2018/07/06 20:27:22.307[3249948416][WRN] [_usb_ll_dev_open] failed to open this device: LIBUSB_ERROR_ACCESS, try next ...
2018/07/06 20:27:22.308[3249948416][ERR] [dmcam_dev_open] open device failed!
but if I run this command：
sudo ./smartTOFViewer
it works normally. So I think it's a permission issue, and create a udev rule file:
sudo nano /etc/udev/rules.d/99-persistent-usb.rules
and content:
SUBSYSTEMS=="usb",ATTRS{idVendor}=="111b", \
ATTRS{idProduct}==1238",GROUP="root", OWNER="root", \
MODE="0666"
The idVendor and idProduct are checked with:
$ lsusb
Bus 001 Device 002: ID 8087:8001 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 006: ID 0bda:0129 Realtek Semiconductor Corp. RTS5129 Card Reader Controller
Bus 002 Device 005: ID 8087:07dc Intel Corp.
Bus 002 Device 004: ID 064e:920b Suyin Corp.
Bus 002 Device 003: ID 046d:c530 Logitech, Inc.
Bus 002 Device 021: ID 111b:1238
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
I also tried setting something:
GROUP="dongtu" or "adm" or "usrs" or "plugdev",
OWNER="dongtu" or just removing it,
adding TAG+="uaccess",
putting in one line and remove " \"
I run this command for reload:
sudo udevadm control --reload
However, all these make no change. I observed that there is no change under /dev/ when I connect the tof, but I failed to figure out why.
I hope to do my job in anaconda with python, which means I can't use sudo in case run under system python environment. Is there any one could help me? Apologize again if I wasted your time.