DAQ Assistant setup Ok, but get Error -2002200

[doogle]

I have an odd symptom when trying to use DAQ Assistant with Labview 8.6.1. (and ultimately TestStand 4.1.1)

I use  the DAQ Assistant wizard from within Labview to use a particular channel - single channel, single sample digital output.

I can then RUN the configuration from withing the wizard, and change the state of the output - it works and the voltage on the channel changes as expected.

I then run my VI with the DAQ Assistant VI within it, and get Error -200220!

As a check, I created another similar VI using the same channel, but using DAQWrite to control the channel. this works fine.

I have tried repairing LabView8.6.1f, DAQmx 9.5.1, and MAX 5.1 through Control Panel but the symptom persists.

Has anyone any ideas how I can resolve this, or tell me what I am doing wrong, please?

P.S. I think that it could be something to do with DAQ Assistant possibly not using the current MAX setup

[GerdW]

Hi doogle,

tell me what I am doing wrong, please?

You use the DAQ assistent expressVI… 🙂

Has anyone any ideas how I can resolve this

Use plain DAQmx functions…

- When plain DAQmx functions run fine, then there is no need to reinstall LabVIEW or DAQmx.

- You use a channel defined in MAX. We cannot check your MAX settings…

[doogle]

I take it that you are advising me to steer away from using DAQ Assistant.

Am I correct?

[GerdW]

Yes, you are… 😄

See this AppNote from NI!

[doogle]

Thank you for the advise - It is far less painful using DAQmx functions than using DAQ assistant.

Having generated code from DAQ assistant I think I see where the problem comes from - rather than using the channel names/configuration from MAX, Assistant must actually hard code the association between the resource and channel name for itself, hence why it seems to use historic configuration data.

What a silly way of doing things.

I'll definitely steer away from using DAQ Assistant in the future.