On Windows 7, 8, and 10, NI-VISA limits the number of COM ports to 256.įor the serial ENET products on Windows NT and 2000, NI-VISA limits the number of COM ports to 256. On Windows 95, 98, 2000, and XP the OS and NI-VISA limit the number of COM ports to 256. On Windows NT, NI-VISA limits the number of COM ports to 99. The maximum number of serial ports that NI-VISA currently supports on any platform is 256. The maximum number of COM ports is dependent on both the operating system (OS) and the serial driver. I just looked it up and according to this Maximum Number of Serial Com Ports on a Windows Computer The only limit would be the number of Com ports a computer can have (I am guessing 255) Is there a 'limit' of number of instruments that i can use in my project? What I am getting at here is you need to post your code so we can see what you did wrong. Obviously that is not how it actually works or you would not be getting the Error -1073807246. Without seeing your code we can only take your word for it that this is how it works. Additional Information In some cases, an invalid VISA resource name into the VISA Configure Serial Port VI will result in an error message pointing to arg 1. My project without BMT932 works well though, Solution Each input to the VISA Configure Serial Port VI corresponds to a different arg in the error message. I also have to create and write to file the measurement data. In my code i initialize the following instruments:
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