When connecting to a serial device or modem, this message means another application is using the same port. This can include mouse drivers, fax software, or another terminal emulation program. There are more programs that might be using a serial port, but these are the most common.

If nothing else should be using the specified port, close all your applications and reboot your PC. If that does not clear up the problem, you’ll need to check the active processes on the PC, looking for those that might be accessing serial ports.

This entry was posted on Monday, March 5th, 2007 at 2:51 pm and is filed under Connect, Modem, Serial (RS232). You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed.