DAQmx Read errors

[michele.santucci]

I'm refactoring an old project that uses this .vi:

DAQmx Read (Digital Bool 1Line 1Point).vi

Sometimes (not every times) this .vi fails to compile for a problem with a missing library/driver .. 

Maybe this depends on this configuration:

I tried to fix it setting the library file path to C:\Windows\SysWOW64\nilvaiu.dll and C:\Windows\System32\nilvaiu.dll 

but nothing changed.

[GerdW]

Hi Michele,

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@michele.santucci wrote:

I'm refactoring an old project that uses this .vi:

DAQmx Read (Digital Bool 1Line 1Point).vi

Sometimes (not every times) this .vi fails to compile for a problem with a missing library/driver .. 

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This is a VI belonging to the DAQmx driver and is provided by NI.

You should not start to mess with VIs provided by NI…

I never had problems to build executables with DAQmx so the problem is maybe related to how you installed your LabVIEW IDE!?

[tux1972]

There's a way to 'fix' the installation ?

I mean from the NI Packet Manager which Product I need to REPAIR to fix them?

[dsb@NI · Accepted solution]

Try repairing NI-DAQmx:

or repair just NI-DAQmx Support for LabVIEW:

[dsb@NI]

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DAQmx Read (Digital Bool 1Line 1Point).vi

Sometimes (not every times) this .vi fails to compile for a problem with a missing library/driver .. 

What happens if you force compile (Ctrl + Run) the VI when the fail to compile problem occurs? Does the problem recur after clearing LabVIEW's compiled object cache?

[tux1972]

Need to try this. Thnx

[michele.santucci]

> What happens if you force compile (Ctrl + Run) the VI when the fail to compile problem occurs?

Nothin'

> Does the problem recur after clearing LabVIEW's compiled object cache?

Well... I learned how to do this just after I fixed the error by replacing DAQmx VIs ... next time I'll try this.

[michele.santucci]

I reinstalled all DAQmx support and replaced one of the original code VI with an older version.

This fixed everything.

Anyway the only thing I changed into this VI was a diagram cleanup... 

[michele.santucci]

I fighting again with DAQmx ... I have a couple of old VIs that will not compile because of these errors:

Both VIs uses a Channel Node in this way:

But as you can see the Channel Node is not correctly referenced/populated .. and I can't understand where's the problem.

And moreover I finally noticed that this section of components pallette is not populated with DAQmx items:

I tried to repair NI DAQMx support but nothing changes.

There's a way to force LabView to update the component pallette ?

I'm missing packages?

And also examples are missing:

???

BTW I'm using LabView 2013 SP1.

[GerdW · Accepted solution]

Hi Michele,

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@michele.santucci wrote:

BTW I'm using LabView 2013 SP1.

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And why did you install DAQmx2024Q3.1 when you still use LabVIEW2013SP1?

This combination will NEVER work!

Please install DAQmx13 to DAQmx16 for your LV2013 installation: this is the suported range!