error -50103 occurred at DAQmx Control Task.vi:6

[sunshine37]

I am new to LabVIEW. I am using LabView 8.6 and an NI cDAQ-9172. For practice, I am trying to make a program that takes temperature and pressure readings and graphs them.

I do not have the modules or sensors yet, so I have started by simulating an NI9217 module for RTD temperature measurement and an NI9237 module for pressure measurement.

I have created 2 while loops that run in parallel. One with a DAQ assistant for the temperature and one with a DAQ assistant for the pressure.

With highlight execution on, when I run the program, the signal goes to both while loops. The temperature seems to run ok and graphs the data. The pressure, however, only goes in once, and I get the error message: "error -50103 occurred at DAQmx Control Task.vi:6 Possible reason(s): The specified resource is reserved. The operation could not be completed as specified."

Also, the stop button does not work on my front panel. I have to use the stop button in the toolbar.

Does anyone have any hints on what I can do to correct this issue or suggestions on better ways to approach this?

Thank you.

[RavensFan · Accepted solution]

Search the forums for error 50103.  That will tell you all you need to know about that error code.

For more information about your issues, post your VI so we can see what might be wrong.

[sunshine37]

Thank you. I see that I cannot have 2 DAQ assistants running at the same time. I will try another route.