"Failed to call service zwave /xxxx"- Error with any zwave command after initial HASS Setup

New to Coding/Pi/HASS, so please be patient (didn’t see a beginners section).

I followed a few youtube videos and got Hass.io set up on my RPi3. Im currently running into an issue trying to add z-wave nodes (or anything associated with z-wave, I get the same warning, just followed with the command requested).

I have Z-Wave Intergration set

I have the following placed in configuration.yaml:

zwave:

usb_path: /dev/ttyACM0

(Ive tried using /ttyUSB0 as well)

Here is a grab from the log file:

2018-12-15 16:19:18 WARNING (Recorder) [homeassistant.components.recorder] Ended unfinished session (id=14 from 2018-12-15 21:50:26.759970)

2018-12-15 16:19:21 ERROR (MainThread) [homeassistant.config_entries] Error setting up entry Z-Wave (import from configuration.yaml) for zwave
Traceback (most recent call last):
File “/usr/local/lib/python3.6/site-packages/openzwave/option.py”, line 78, in init
raise ZWaveException(u"Can’t find device %s : %s" % (device, traceback.format_exception(*sys.exc_info())))
openzwave.object.ZWaveException: “Zwave Generic Exception : Can’t find device /dev/ttyACM0 : [‘NoneType: None\n’]”

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File “/usr/local/lib/python3.6/site-packages/homeassistant/config_entries.py”, line 249, in async_setup
result = await component.async_setup_entry(hass, self)
File “/usr/local/lib/python3.6/site-packages/homeassistant/components/zwave/init.py”, line 283, in async_setup_entry
config_path=config.get(CONF_CONFIG_PATH))
File “/usr/local/lib/python3.6/site-packages/openzwave/option.py”, line 81, in init
raise ZWaveException(u"Error when retrieving device %s : %s" % (device, traceback.format_exception(*sys.exc_info())))
openzwave.object.ZWaveException: ‘Zwave Generic Exception : Error when retrieving device /dev/ttyACM0 : [‘Traceback (most recent call last):\n’, ’ File “/usr/local/lib/python3.6/site-packages/openzwave/option.py”, line 78, in init\n raise ZWaveException(u"Can\‘t find device %s : %s" % (device, traceback.format_exception(*sys.exc_info())))\n’, ‘openzwave.object.ZWaveException: “Zwave Generic Exception : Can\'t find device /dev/ttyACM0 : [\‘NoneType: None\\\\n\’]”\n’]’

Using a USB Z-Wave hub (Nortek HUSBZB-1)

Uploaded screenshot of error included. Please let me know if you need anything else to help me diagnose this.

I apparently don’t even know how to use code blocks, sorry…

I was getting the same error and this post fixed it for me:

https://community.home-assistant.io/t/homeassistant-core-unable-to-find-service-zwave-add-node-secure/82414

Let me know if you need help implementing the solution.