C:\Users\mtapia\Desktop\pc-nrfutil-master>nrfutil dfu usb-serial -pkg aquana_nrf52840_s140.zip -p COM9 -b 115200
  [------------------------------------]    0%
Traceback (most recent call last):
  File "c:\users\mtapia\appdata\local\programs\python\python36-32\lib\site-packages\nordicsemi\dfu\dfu_transport_serial.py", line 199, in open
    baudrate=self.baud_rate, rtscts=self.flow_control, timeout=self.DEFAULT_SERIAL_PORT_TIMEOUT)
  File "c:\users\mtapia\appdata\local\programs\python\python36-32\lib\site-packages\serial\serialwin32.py", line 33, in __init__
    super(Serial, self).__init__(*args, **kwargs)
  File "c:\users\mtapia\appdata\local\programs\python\python36-32\lib\site-packages\serial\serialutil.py", line 244, in __init__
    self.open()
  File "c:\users\mtapia\appdata\local\programs\python\python36-32\lib\site-packages\serial\serialwin32.py", line 64, in open
    raise SerialException("could not open port {!r}: {!r}".format(self.portstr, ctypes.WinError()))
serial.serialutil.SerialException: could not open port 'COM9': PermissionError(13, 'Access is denied.', None, 5)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\mtapia\AppData\Local\Programs\Python\Python36-32\Scripts\nrfutil-script.py", line 11, in <module>
    load_entry_point('nrfutil==6.1.0', 'console_scripts', 'nrfutil')()
  File "c:\users\mtapia\appdata\local\programs\python\python36-32\lib\site-packages\click\core.py", line 1128, in __call__
    return self.main(*args, **kwargs)
  File "c:\users\mtapia\appdata\local\programs\python\python36-32\lib\site-packages\click\core.py", line 1053, in main
    rv = self.invoke(ctx)
  File "c:\users\mtapia\appdata\local\programs\python\python36-32\lib\site-packages\click\core.py", line 1659, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "c:\users\mtapia\appdata\local\programs\python\python36-32\lib\site-packages\click\core.py", line 1659, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "c:\users\mtapia\appdata\local\programs\python\python36-32\lib\site-packages\click\core.py", line 1395, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "c:\users\mtapia\appdata\local\programs\python\python36-32\lib\site-packages\click\core.py", line 754, in invoke
    return __callback(*args, **kwargs)
  File "c:\users\mtapia\appdata\local\programs\python\python36-32\lib\site-packages\nordicsemi\__main__.py", line 1015, in usb_serial
    timeout)
  File "c:\users\mtapia\appdata\local\programs\python\python36-32\lib\site-packages\nordicsemi\__main__.py", line 970, in do_serial
    dfu.dfu_send_images()
  File "c:\users\mtapia\appdata\local\programs\python\python36-32\lib\site-packages\nordicsemi\dfu\dfu.py", line 127, in dfu_send_images
    self._dfu_send_image(self.manifest.application)
  File "c:\users\mtapia\appdata\local\programs\python\python36-32\lib\site-packages\nordicsemi\dfu\dfu.py", line 88, in _dfu_send_image
    self.dfu_transport.open()
  File "c:\users\mtapia\appdata\local\programs\python\python36-32\lib\site-packages\nordicsemi\dfu\dfu_transport_serial.py", line 203, in open
    ". Reason: {1}".format(self.com_port, e.strerror))
pc_ble_driver_py.exceptions.NordicSemiException: Serial port could not be opened on COM9. Reason: None