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How many VIs or EXEs can access the DAQmx drivers on one PC ?

A customer has built a test sequencer, where about 20 executables (Built with LabVIEW 7.1) are used for running tests. All exes are using DAQmx 7.1 for analog in Data Aquisition.

Now the customer reported, that 19 exes can be loaded without problems, but the last exe has terminated with the following error message:

Error loading "nilvaiu.dll"
An DLL initialisation routine failed!

The customer also told us, after starting the M&A-Explorer, he could only start 15 of his executables.

Is there a limitation about how many VIs or EXEs can access the measurement hardware, Especally when the aquisition types are all the same (here Analog measurements) ?

Regards
Heirnich Eidloth
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Heinrich,

there is no limitation on the number of VIs or applications which access NI-DAQ simultaneously. please reinstall NI-DAQ and try it again.

regards,
NorbertB
NI Germany
Norbert
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Hello, and sorry for being late with my answer.

Reinstalling DAQmx was one part of the solution. Another part is disconneting unused polymorphic VIs.
Now the customer's testsequencer works fine.

Regards
Heinrich
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