I am trying to control 8 USB to R232 through a Tripp-Lite 10-Port HUB (Model U222-010-R) and not having consistant results. Right after restarting my computer I have no issues running the following program: (I tried to upload the VI directly but no success so here is the snippet)
I have made sure that the COM ports that I select are the one's available on both the Device manager and in NI-MAX. But after awhile this does not work or if the HUB gets unplugged and replugged in (even if the names are correct and refreshed in both the Device Manager and NI-MAX) I get the error code "Property Node (arg 8) in VISA Configure Serial Port (Instr).vi" I want to be able to see these ports more consistantly without having to reboot my computer all the time. Is there a better setup for this? The previous setup of the computer had a PCI card for this and we had no issues with the code but are running into problems with our upgrade. The previous computer ran Windows XP and had PCI cards and the new computer I am trying to use has Windows 8 and the USB HUB. Thanks for any help you can give!!