Traceback (most recent call last):
  File "/home/jenkins/workspace/osmo-gsm-tester_manual-run-all/osmo-gsm-tester/src/osmo_gsm_tester/test.py", line 61, in run
    self.path)
  File "/home/jenkins/workspace/osmo-gsm-tester_manual-run-all/osmo-gsm-tester/src/osmo_gsm_tester/util.py", line 326, in run_python_file
    spec.loader.exec_module( importlib.util.module_from_spec(spec) )
  File "<frozen importlib._bootstrap_external>", line 673, in exec_module
  File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
  File "/home/jenkins/workspace/osmo-gsm-tester_manual-run-all/osmo-gsm-tester/suites/ussd/assert_extension.py", line 13, in <module>
    bts.start()
  File "/home/jenkins/workspace/osmo-gsm-tester_manual-run-all/osmo-gsm-tester/src/osmo_gsm_tester/bts_nanobts.py", line 93, in start
    self._configure()
  File "/home/jenkins/workspace/osmo-gsm-tester_manual-run-all/osmo-gsm-tester/src/osmo_gsm_tester/bts_nanobts.py", line 51, in _configure
    self.pwsup = powersupply.get_instance_by_type(pwsup_type, pwsup_opt)
  File "/home/jenkins/workspace/osmo-gsm-tester_manual-run-all/osmo-gsm-tester/src/osmo_gsm_tester/powersupply.py", line 68, in get_instance_by_type
    return obj(pwsupply_opt)
  File "/home/jenkins/workspace/osmo-gsm-tester_manual-run-all/osmo-gsm-tester/src/osmo_gsm_tester/powersupply_sispm.py", line 46, in __init__
    did = sispm.getid(d)
  File "/usr/local/lib/python3.5/dist-packages/sispm/__init__.py", line 81, in getid
    id =  dev.ctrl_transfer(0xa1, 0x01, 0x0301, 0, buf, 500)
  File "/usr/lib/python3/dist-packages/usb/core.py", line 1034, in ctrl_transfer
    self._ctx.managed_claim_interface(self, interface_number)
  File "/usr/lib/python3/dist-packages/usb/core.py", line 102, in wrapper
    return f(self, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/usb/core.py", line 167, in managed_claim_interface
    self.backend.claim_interface(self.handle, i)
  File "/usr/lib/python3/dist-packages/usb/backend/libusb1.py", line 811, in claim_interface
    _check(self.lib.libusb_claim_interface(dev_handle.handle, intf))
  File "/usr/lib/python3/dist-packages/usb/backend/libusb1.py", line 595, in _check
    raise USBError(_strerror(ret), ret, _libusb_errno[ret])
usb.core.USBError: [Errno 16] Resource busy