On my old computer, I had a MScomm control from which I used to capture some data coming from a phone box. Everything worked great. When I got a new computer, It doesn't work. I get the following error 'The device is not open' . On my old computer, I used port 1 but on this new computer when I try to use port 1, it says 'Envalid port number' The only port I can use is port 3 and then I get a 'The device is not open' error message. Any help would be appreciated. Thanks.

Hello World!

I think it would be helpful to include the following items in your post.

(1) Your new OS.

(2) The number of physical Serial Ports you have.

(3) What other serial devices are plugged into the machine.

Com3 is usually assigned to the internal modem by default. I'm not even going to mention the Device Manager because you've obviously been there already. Beyond that issue you may want to check your BIOS to see if the serial ports that you have are activated. Doubtful though, because you would have seen an exclamation point next to the port if it wasn't.  If that fails, there's always that uncomfortable excursion into the Registry.

  

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