Multiple Application Instances Accessing Same DAQ Device

[peabody_bass]

I have a fairly straightforward application that reads from a wireless DAQ device (NI-9205 connected to NI WLS-9163).  I'd like to run multiple instances of the executable, but I get error -201105 (resource reserved) when the DAQmx task is started on the second instance.  Each instance is attempting to acquire from different channels from the same DAQ device.  Is this an issue with the DAQ device in particular, or with DAQmx in general?  Thanks.

-Joe

[jjgors · Accepted solution]

Hi Joe,

Unfortunately you can only access one type of channel with each program.  For example you could have one program access AI and another use AO, but you cannot have two different programs access AI from the same card.  This is common among all of NI DAQ devices.

[peabody_bass]

Thanks.  That's what I figured.