Unable to Load USB Driver in LV for Total Phase's Aardvark I2C adaptor

I have tried to instal Total Phase's Aardvark I2C USB driver for LabVIEW on two computers and two versions of LV (8.5 and 7.1) without success. The Windows driver seems to be working fine as their command center gui terminal-esque program works without a hitch, but the LV DLL doesn't seem to work.
Attached is the very simple vi to find connected Aardvark USB devices (aa_find_devices). It always returns the same error code, 8002, which resolves to:
AA_UNABLE_TO_LOAD_DRIVER
-2
unable to load USB driver
From their documentation: http://www.totalphase.com/docs/aardvark_datasheet/sect005/#s5.9
This looks like perhaps the LabVIEW DL, "aardvark.dll" maybe having a versioning issue. So my question is this: Using LabVIEW, how does one debug dll dependencies and resolve issues like this? Do I need the source code for the lib?
Cheers,
Joe Gorse
Solved!
Go to Solution.
Attachments:
find_devices.vi ‏11 KB

Dear Joe,
Let me start off by apologizing for the inconvenience you
have gone through. I am an engineer at Total Phase. We are
working on fixing this issue for our next release of the
Aardvark LabVIEW Driver. This forum post was only brought
to our attention today. In the future, you can also let
Total Phase know about these kinds of issues by emailing
[email protected] We are very responsive through
email or phone.
The problem you are experiencing has to do with versioning
issues between our DLL and USB driver. Specifically, DLLs
before v5.xx must use the older version of our USB driver.
By replacing the DLL from our latest version of Control
Center, you have effectively upgraded the DLL that the
LabVIEW driver is using and made it compatible with v2.xx of
the USB driver.
The most likely reason that smercurio_fc did not see a
difference between the DLL in Aardvark Control Center and
the LabVIEW driver is because he is using an older version
of Control Center and correspondingly an older version of
the USB driver.
The reason that we have not packaged the LabVIEW driver with
latest DLL is due to the fact that a few functions have
changed their function prototypes (for example aa_open_ext
and aa_spi_write), and the VIs have not yet been updated
accordingly. Although updating the DLL solved your USB
driver issue, it introduced this new issue. If you try to
use these certain VIs, LabVIEW will error out.
We are currently working on updating the LabVIEW drivers to
work cohesively with the new DLL and USB driver, and this
should be available soon. If you need immediate
availability to the functions with new prototypes you will
have to change it manually. The other recommended option is
to simply revert back to the DLL that is packaged with our
LabVIEW driver and downgrade the USB driver back to v1.xx.
I will make sure to post again once the update is released,
and I once again apologize for the inconvenience.
Best regards,
Etai

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