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Topic: Arduino Uno - Error Message - Help, please. [I solved it already, Thanks.] (Read 54 times) previous topic - next topic

JosephTam

Jan 13, 2017, 03:42 pm Last Edit: Jan 14, 2017, 01:59 am by JosephTam Reason: I have solved this already by closing other app that are using the USB port.
I've just bought the Arduino Uno Board.

I followed the guide to upload the "blink" sketch.  But I have got the following error message.  

Please kindly share how this could be fixed.  Does this mean my Uno Board is not functioning and need to get a replacement from the store?  Thanks.


ERROR message:

avrdude: ser_open(): can't open device "/dev/cu.usbmodem1421": Resource busy
Problem uploading to board.  See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.

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