07-03-2014 07:06 PM
Hi I am trying to run some old software on an XP machine.
The Measurement and Automation Explorer gets different Visa resource names every time I run it
eg it starts off with ASRL15:INSTR, ASRL16:INSTR and the next time I run it it says ASRL21:INSTR and ASRL23:INSTR (not sure of the exact nubmers) and the numbers keep getting bigger.
Any clues?
Thanks
Paul
07-03-2014 07:58 PM
I'm guessing you are using USB to RS232 adapters. And I'm also willing to bet that each time you reboot your computer or remove and plug in your adapter, the computer sees it as a new virtual port. If you go into your devices, you will likely see the same virtual serial ports.
07-03-2014 08:01 PM
No, no adapters. Just Com1 and LPT 1
MAX is giving them different names each time.
07-03-2014 08:13 PM
07-03-2014 08:27 PM
Yes I have a serial port on the mother board.
The Measurement and Automation Explorer version is 4.7.7
Here:
http://digital.ni.com/public.nsf/allkb/936298454061FE5886256C2A0060B321
I read:
If the issue is still not resolved, disable the COM Port, which will release the current session with that port. This can be done by accessing the properties of the COM Port.
I did that. Rebooted the computer. Max was getting the numbers wrong still. I mangaged to manually enter ASRL1::INSTR in the application I am trying to run and it is actually sending stuff out the serial port now so I suppose I have managed to bypass the issue.
07-03-2014 10:03 PM
08-21-2019 11:36 AM
I am facing same issue. Also, when I re plugged the com port number get changed!
In my MAX, I getting the reading type above similar. What should I do! Also I wanna ask can we use directly USB 232 Port and can connect the pc port. ?
08-21-2019 11:36 AM
YES