Why do I get a "NIDAQmx error: Device not available for routing" error when I output samples to an ANALOGOUTPUT object in Data Acquisition Toolbox 2.11 (R2007b) ?

I receive the following error when I use PUTSAMPLE to output samples to a NI-DAQmx interface ANALOGOUTPUT object after accessing a NI-DAQ Traditional interface ANALOGOUTPUT object corresponding to the same device.

Reproduction Code:

ao=analogoutput('nidaq',1) % Use of Trad Nidaq
addchannel(ao,1)
putsample(ao,0)
ao2=analogoutput('nidaq','Dev4') % Use of  NiDAQmx
addchannel(ao2,1)
putsample(ao2,0)

ERROR: ??? NIDAQmx error : Device not available for routing.  It is possible that the device needs to be reset or that the device is being reset.  If you are resetting the device, wait for the reset to complete.  For example, if you have used the device through Traditional NI-DAQ, you must reset the device before the requested route can be made.  For SCXI devices, you must reset the communicator DAQ device. Call the Traditional NI-DAQ Device Reset VI or the Init_DA_Brds function. To reset all devices in Traditional NI-DAQ, right-click the Traditional NI-DAQ Devices folder in MAX and select Reset Driver for Traditional NI-DAQ. Task Name: MWDAT0018  Status Code: -89130

Answer 1

[MathWorks Support Team]

Once you access a device from the Traditional NI-DAQ interface, it is reserved by Traditional NI-DAQ, and cannot be used by the NI-DAQmx interface.When the NI-DAQmx interface attempts to start the device, it is unable to reserve it, causing the error.

Use National Instrument's Measurement and Automation Explorer to reset the Traditional NI-DAQ device. Doing so will make it available under NI-DAQmx, as mentioned in the error message.

For more information, please see the following related Bug Report which discusses the same source of error:

https://www.mathworks.com/support/bugreports/284483