Instrument Control (GPIB, Serial, VISA, IVI)

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detecting mouse activity on PC in labview

I tried the Serial loopback test vI and the serial to disk VI, but both the VIs failed to detect any activity at the serial port of my PC. Also, The VISA interactive driver was not able to detect the serial port. It gave an error saying the device is detected but VISA is unable to access it, what does that mean? What is the best way to detect and control the com port of my PC
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You will get this error if you have another application open that is accessing the serial port. If you have a terminal emulation program running such as Hyperaccess, close it and try VISA again.
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