Cannot combine AI channels into a four-channel from two myDAQs

Hello,
I used MAX explorer to add two analog input(AI) channels of myDAQ into a task. It works fine for this.
For now I need a four-channel's analog input application, so I get two myDAQs for that. I add both of two AI channels of the two myDAQs into a task but always get the message:
An exception occurred within the external code call by a Call ... VI "BlockState.vi:2" was stopped at node "" at a call to "DAQmxAssistant_DAQmx Control Task.vi:1"
Showed as below:
The pic below shows two myDAQ are used simultaneously for a four-channel AI application.
Could you please help or give some hint? The situation is quite easy to reproduced. Just get two myDAQs and add both of its two AI channels of each myDAQ to combine four channels into MAX explorer's task.
Thank you!
LKKSPP
Solved!
Go to Solution.

Hello cpan,
Thanks the new version of DAQmx driver. It responses more reasonable as the picture shown below.
It probably means that a task can only contain the channels of one myDAQ; channels in different myDAQs are not allowed to combine into one task!
I guess this is a limitation for student version of myDAQ, though i hope NI can get rid of this restriction.
For myDAQ, could you confirm the limit as I described above?
Thanks for the help anyway.

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