[HalHoffman]

Hi Andrew,

This was helpful and solved the problem.

The new computer came with Microsoft Visual C++ 2015 Redistributable, and I had updated to the newest one, 2015-2019, thinking that might help. On your advice I installed 2012 and then the program worked. I haven’t had to install 2012 up till now so it must have been present on previous computers and not on this newer one.

Thanks for the help!

[HalHoffman]

Yes, the ftd2xx.dll file is in the same directory. I had moved the dll files from “Program Files (x86)/Signal Hound/Spike” to this test directory to make an example with the fewest files possible.

I had done another test where the example program opened ftd2xx.dll instead of sa_api.dll, and that was successful.
sa_dll = ctypes.CDLL(“ftd2xx.dll”), so ctypes found that file. I don’t know if that is a useful clue.

Another observation is that with this same computer, running Window 1903, my software failed to open a DataQ data logging module, while it was successful with several other computers running Windows 1803. It generated a different error. It is curious that access to two different devices would fail with the new computer.

Thanks

[Author]

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