User configuration file does not exist or is not a regular file, skipping I am facing issues while uploading sketch to Adafruit Feature 32u4 Bluefruit LE devices. When i try to upload Blink demo it was working fine and my device also blinking, But bellow error i am getting every time when i upload sketch.

   System wide configuration file is "/Applications/Arduino.app/Contents/Java/hardware/tools/avr/etc/avrdude.conf"
     User configuration file is "/Users/myMacmnin/.avrduderc"
     User configuration file does not exist or is not a regular file, skipping


I am using Adafruit Feature 32u4 Bluefruit Le device,Arduion 1.8.3 version, MacMini with macOs Sierra(10.12.3).
Finally i found answer for my question, It happen because of uploading sketch in selected pin.

// Neopixel
//#define PIN            6   /* Pin used to drive the NeoPixels */
#define PIN            13   /* Pin used to drive the NeoPixels */


I Changed Pin 6 to 13 , it's worked for me.