Thanks AJ. I was using some older 64bit drivers that were already in our framework, from a bit-bang application developed about ten years ago using the same DLP board. I’d also tried some others I found in the forums. I’ll try the latest ones you pointed to and see how they work out. I have spent quite a bit of time on understanding the documentation I downloaded from the FTDI website and trying to get the handle passing correctly. Our whole team is working with 64bit LabView 2019 now, and my product must go back into the characterization framework so using 32bit is not really practical at this stage.
Thanks again