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2. Close any programmer serial port connections
Close any existing COM port connections you have that might interfere with the upgrading
process. For example, if you have AVR Studio open, make sure the AVRISP programming
window is closed as this window ties up the COM port your programmer is using.
Pololu Orangutan USB Programmer User's Guide
© 2001–2010 Pololu Corporation
8. Updating Your Programmer's Firmware
Page 23 of 29