I am having trouble performing USBTMC control out transfers using the NI VISA driver.
In terms of background, I'm presently working on USBTMC device firmware, and was hoping to use custom USB control out transactions to help with debugging. I use Windows 10, 64-bit, with NI VISA 19.0. This issue isn't critical for me to solve, but it is a bit perplexing.
I have tried sending data both with IVI VISA .Net, pyvisa, and the NI VISA Test Panel. In .Net, I use