Sorry, I can't help, but you'll have to provide a lot more information before anyone can help you.

First of all, what version of Windows are you running (i.e. Windows 10 64bit, Windows XP 32bit, etc), which version of DOSBox are you using, does your PC have a parallel port, do you get that error message when you first start DOSBox, or during a game in DOSBOx, etc, etc.

Remember, whenever you are describing a problem, it's always much better to provide too much information than not enough.

jamesanderson wrote:

Hi all, […]
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Hi all,

Basically, i downloaded DOSBox for running old executable file. Everything works fine but i am getting error as

"Desired serial port not supported"

Any idea guys?

Thanks a lot

If it's a game you probably get support if not propably not.