How to use two DAQmx assistant ?

     I am using 2 DAQmx assistant objectsfor acquiring 2 distinct different signal.when i run it, it is showing following error.
                      ERROR 50103 occured at DAQmx control task.vi:8
                      POSSIBLE REASON : The specified resource is reserved.The operation could not be completed as specified.
    Pls. tell me how can i clear it.
                                 THANK YOU !

Any chance you could attach your LabVIEW code for us to see? It helps to visualise your issue.
You may be running the two DAQmx assitants in parallel, and thus they will be trying to access the same resource simultaneously. They probably need to be ran sequentially. To ensure this, try wiring the error out of the first assistant into the error in of the second assistant.
Thoric (CLA, CLED, CTD and LabVIEW Champion)

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