Creating a pipeline with a blob file config that doesn't exist results in obscure error

I switched to a new detection network and upon doing so made a typo in the blob_file_config which presented me with a very obscure error seen below. It would be helpful if an error was thrown if the blob or blob config file does not exist.

Using Custom Calibration File: depthai.calib
XLink initialized.
Sending device firmware "cmd_file": /home/pi/depthai/depthai.cmd
Successfully connected to device.
Loading config file
watchdog started Attempting to open stream config_d2h
3000
Successfully opened stream config_d2h with ID #0!
Closing stream config_d2h: ...
Closing stream config_d2h: DONE.
WARNING: Version (dev) does not match (c722ebde932d6627463321816a5654b5be6069e1 & 30295b558351cd030408e12a220cdd55b5fb450e)
EEPROM data: invalid / unprogrammed
watchdog triggered
Stopping threads: ...
Stopping threads: DONE 0.000s.
Closing all observer streams: ...
Closing all observer streams: DONE.
Reseting device: 0.
E: [global] [    215801] [Scheduler00Thr] dispatcherEventSend:53        Write failed (header) (err -4) | event XLINK_RESET_REQ

E: [xLink] [    215801] [Scheduler00Thr] sendEvents:1036        Event sending failed
Reseting: DONE.
XLink initialized.
Sending device firmware "cmd_file": /home/pi/depthai/depthai.cmd
Successfully connected to device.
Loading config file
Attempting to open stream config_d2h
Successfully opened stream config_d2h with ID #0!
Closing stream config_d2h: ...
Closing stream config_d2h: DONE.
WARNING: Version (dev) does not match (c722ebde932d6627463321816a5654b5be6069e1 & 30295b558351cd030408e12a220cdd55b5fb450e)
EEPROM data: invalid / unprogrammed
terminate called after throwing an instance of 'nlohmann::detail::parse_error'
  what():  [json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - unexpected end of input; expected '[', '{', or a literal
Aborted

Example code:

depthai.init_device(consts.resource_paths.device_cmd_fpath)

config = {
    'streams': ['metaout', 'previewout'],
    'depth':
    {
        'calibration_file': consts.resource_paths.custom_calib_fpath,
        'padding_factor': 0.3
    },
    'ai':
    {
        'blob_file': "networks/person-2/face-detection-adas-0001.blob",
        # Notice the typo here with networks-2 instead of person-2
        'blob_file_config': "networks-2/person/face-detection-adas-0001_depth.json",
        'calc_dist_to_bb': True
    }
}

pipeline = depthai.create_pipeline(config)

[Luxonis-Steven]

Hi @ConnorChristie , I did a test today by removing a JSON config under an nn folder and ran the app. The latest app has the feature to notify the user “NN JSON not found” and exit right after the warning (example shown as below). Feel free to let us know if has any thoughts.

Thanks!

[Luxonis-Brandon]

Got it, thanks for checking. So this actually was just a different check that was already there… We’ll get this detected as well.

Thanks again!