Zador

Jon, I purchased one of these (ICUSB2324X) recently and it seems to have issues working with NI VISA. The problem is described below (originally posted on NI forum here http://forums.ni.com/ni/board/message?board.id=140&message.id=37658&jump=true#M37658). Any advice? --------------------------------------------------- I am using StarTech.com 4-port USB to RS232 adapter (p/n ICUSB2324X) under Win XP, LabVIEW 7.1, NI VISA 4.5. The following problem occurs when a PC is freshly rebooted: VISA Find Resource returns resource names for all serial ports in the system; however, VISA Open returns error code -1073807343 [VISA: (Hex 0xBFFF0011) Insufficient location information or the device or resource is not present in the system.], when called with a resource name corresponding to one of the aforementioned 4 expansion ports. Then, as soon as I open MAX (v4.5) and expand "Serial and Parallel" in the configuration tree, VISA can work with those 4 ports without any problem. But only until the system is rebooted, after which it is back to square one. I have never had this problem with other COM ports, whether on-board or expansion (PCI, USB, or IP). Obviously, MAX is somehow able to properly resolve and configure these ports. I would like to do whatever MAX is doing programmatically or, at least, figure out a way to save the configuration so that I don't have to run MAX after every system reboot. Any insight is appreciated!