why this error message comes while uploading to arduino if labview is open??
ERROR:
Sketch uses 21,002 bytes (8%) of program storage space. Maximum is 253,952 bytes.
Global variables use 1,270 bytes (15%) of dynamic memory, leaving 6,922 bytes for local variables. Maximum is 8,192 bytes.
avrdude: ser_open(): can't open device "\\.\COM4": Access is denied.
avrdude: ser_drain(): read error: The handle is invalid.
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.
This report would have more information with
"Show verbose output during compilation"
enabled in File > Preferences.
