I have the problem solved. None of the VIs had been set up to
allow passing in "USB-PP1" (or any other USB-PP*) so I had to
rework them. I am still surprised that you don't supply VIs that
include this.

Thanks.

I've just added a USB cable and adapter for my ADC-212. I need to find LabView VIs for open, close, etc. that include an option for setting the port to USB-PP1. The VIs that downloaded with the latest version of the driver (weba200_r4_00.exe) have a comment about using "101" for USB ports, but that ...