NI USB-6212 analog output not appearing for live acquisition and processing

Hello. I'm using Matlab 2015a. The DAQ is able to connect to the computer, as shown below. I am trying to use Live Acquisition and Processing through this code from here: https://www.mathworks.com/matlabcentral/fileexchange/46685-live-data-acquisition-for-real-time-signal-processing-in-matlab , but I get the problem below (the analog input is able to connect, but the analog output is not.) When I type Gen.DeviceName = ' and then hit tab in the Command Window, a pop-up indicates "No Completions Found." I'm able to generate a signal using the NI Device Monitor Test Panels and Measurement & Automation Explorer. Any thoughts on why the output is not working for live processing? Specifically, why is it that the same value/name I used for DeviceName on analog input, not work for analog output?

Thanks, WC

>> daq.getDevices

   ans = 

   ni: National Instruments USB-6212 (BNC) (Device ID: 'Dev1')
   Analog input subsystem supports:
      4 ranges supported
      Rates from 0.1 to 400000.0 scans/sec
      16 channels ('ai0' - 'ai15')
      'Voltage' measurement type

   Analog output subsystem supports:
      -10 to +10 Volts range
      Rates from 0.1 to 250000.0 scans/sec
      2 channels ('ao0','ao1')
      'Voltage' measurement type

   Digital subsystem supports:
      24 channels ('port0/line0' - 'port2/line7')
      'InputOnly','OutputOnly','Bidirectional' measurement types

   Counter input subsystem supports:
      Rates from 0.1 to 80000000.0 scans/sec
      2 channels ('ctr0','ctr1')
      'EdgeCount','PulseWidth','Frequency','Position' measurement types

   Counter output subsystem supports:
      Rates from 0.1 to 80000000.0 scans/sec
      2 channels ('ctr0','ctr1')
      'PulseGeneration' measurement type

Code from the editor:

   % Analog Input 
   Acq = dspdemo.DAQRecorder(...
    'DeviceName','Dev1 - National Instruments USB-6212 (BNC)',...
    'SampleRate', fs,'SamplesPerFrame',frameLength,...
    'ChannelNumbers',0,...
    'OutputNumOverrunSamples', true)

   % output
   Gen = dspdemo.DAQPlayer(...
    'DeviceName','Dev1 - National Instruments USB-6212 (BNC)',...
    'SampleRate', fs,...
    'FirstChannelNumber',0,...
    'OutputDeviceUnderrunStatus', true,...
    'TargetLatencyFrames', 2);

>> encoder_Iive

   Acq = 

System: dspdemo.DAQRecorder

Properties:
               DeviceName: 'Dev1 - National Instruments USB-6212 (BNC)'
          MeasurementType: 'Voltage'                                   
    TerminalConfiguration: 'SingleEnded'                               
               SampleRate: 50000                                       
          SamplesPerFrame: 2000                                        
           ChannelNumbers: 0                                           
  OutputNumOverrunSamples: true                                        

   Error using matlab.system.StringSet/findMatch (line 58)
   Dev1 - National Instruments USB-6212 (BNC) is not a valid
   setting for the DeviceName property.

   Error in matlab.system.SystemProp/parseInputs (line 46)

   Error in matlab.system.SystemProp/sysObjSetProperties
   (line 43)

   Error in dspdemo.DAQPlayer (line 158)

   Error in encoder_Iive (line 45)
   Gen = dspdemo.DAQPlayer(...