Windows XP does not allow applications to use the virtual serial (COM) Ports

Operating system: Windows XP Professional version 2002 Service Pack 3

I want to use some applications to control virtual serial (COM) on a device of PEARL IOLAN STS8 D/TruePort ports in Windows XP Professional SP3. When I configure the IOLAN/TruePort I see the COM ports in the Windows Device Manager and I am able to configure my applications to use ports.  However, when applications try to open the serial ports, I get an error saying that the port is already in use or does not exist.

I tried various alternatives to remove/re-add the ports 'in use' in Windows before you configure IOLAN/TruePort and applications. This (sometimes) allows me to use the ports but if the PC is turned off later and rebooted the problem reappears.

Is there a reliable way to create and use virtual COM ports in Windows XP?

The IOLAN/TruePort Pearl versions are:

V4.3 Device Manager
Firmware TruePort 6.4

Hello

 

The question you posted would be better suited in the TechNet Forums. I would recommend posting your query in the TechNet Forums.

http://social.technet.Microsoft.com/forums/en-us/itproxpsp/threads

 

I hope this helps!

Tags: Windows

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