How to achieve data from more than 1 DAQ-assistant?

When running my LabVIEW program using the data coming from 2 simulation sources, no problem occurs and data is correct.
When using the data coming from 2 DAQ-assistants (real data), an error occurs, telling the following:
"ERROR 50103 occured at DAQmx Read (Analog 1D Wfm NChan NSamp).vi, reason: The specified resource is reserved. The operation could not be completed as specified"
Does anyone know what exactly is wrong and how to solve this problem?
Nowhere I found a solution for this problem and I have been trying numerous things to change in the program, but the same problem keeps occuring.
Could anyone please help me?
I need to solve this to be able to perform tests for my graduation project.
Tha
nk you very much in advance,
Yours Sincerely,
Karel Rycek

The problem is you are trying to access the AI channels at the same time. When you setup the first DAQ assistant it reserves the AI section of the board. When you then try and use the second DAQ Assistant you get the error because it is trying to access a reserved section. If you had 2 different boards this wouldn't be a problem. That is probably overkill though. What you can do is read multiple channels in the 1st DAQ assistant and then in your program split the data off if you need to do different calculations.

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