Multiple DAQs in one vi

Hi.
I want to aquire data from 4 separate DAQs in one.vi (at 0.5 sec)
How can i do this, easier ?
Of course, i tried 4 DAQ asistants, but it is not working ( Error 50103. it says that the specified resource is reserved.)
how can i do 4 separate tasks and read analog voltages from each DAQ ?
Thanks.

dsasorin wrote:
I think using daq mx modules, i avoid conflicts and limited resources when using daqs like in this case. ( Or not ?) This is why i want use daq mx modules.
Ok, I think you wanna say, instead of using DAQ Assistant, you want to use low level functions using DAQmx VIs... Thats definitely a good idea.
Well the code that you had attached, has issues.
In you code you're trying to.
1. Use an existing global task.
2. Add few more physical channels to that task.
3. Trying to just one sample from one channel... and this will throw an error ( -200523).
Coming back to same question.
Moderator1983 wrote:
Well answer two simple questions:
1. How many DAQ devices & what model are avilable (connected) with your computer.
2. How many channels from each DAQ device, you're planning to use (for acqusition of various signals)
And if you want to start exploring the DAQmx functions, refer to this link.
I am not allergic to Kudos, in fact I love Kudos.
Make your LabVIEW experience more CONVENIENT.

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Hey all,
This is a crosspost, I posted somewhere else after posting this post, just because I did not know whether I posted in the right place, here is the link to the other in case anyone else comes across this problem: http://forums.ni.com/t5/Multifunction-DAQ/one-task-control-multiple-DAQ-modules/td-p/3170766 Sorry about that.
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Spoiler (Highlight to read)
Recently I have successfully shared data of 2D array among different vis in a project, using circular buffer.
However, there is only one circular buffer allowed in one project for one data type.
I want different vis, running and getting data from circular buffer in different speed, all getting data as a queue from circular buffer. Like the circular buffer's read continuous mode.
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LawrenceChong wrote:
Spoiler (Highlight to read)
Recently I have successfully shared data of 2D array among different vis in a project, using circular buffer.
However, there is only one circular buffer allowed in one project for one data type.
I want different vis, running and getting data from circular buffer in different speed, all getting data as a queue from circular buffer. Like the circular buffer's read continuous mode.
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So if it is possible that there are multiple pointers or queues in circular buffer to keep track the progress of different vis, and data only update when it gets input from DAQ but not deleted when read?
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ben64 wrote:
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Multiple DAQs in one vi

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