Error compiling for board Arduino Uno

Question

I am relatively new to Arduino and I am trying to code some neo pixels and every time I try to verify my code this error comes up:

Arduino: 1.8.12 (Mac OS X), Board: "Arduino Uno"

loading libs from /Users/erinshankland/Documents/Arduino/libraries: reading dir >/Users/erinshankland/Documents/Arduino/libraries: open >/Users/erinshankland/Documents/Arduino/libraries: operation not permitted

Error compiling for board Arduino Uno.

This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences.

this is my code:

#include <Adafruit_NeoPixel.h>
#define PIN 6
 
#define NUMPIXELS 15
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRBW + NEO_KHZ800);
 
// this constant won't change:
const int btnRed = 2; // the pin that the pushbutton is attached to
const int btnBlue = 3; // the pin that the pushbutton is attached to
const int btnGreen = 4; // the pin that the pushbutton is attached to
const int btnPurple = 5; // the pin that the pushbutton is attached to
 
 
void setup() {
 randomSeed(analogRead(A0));
 // put your setup code here, to run once:
 pinMode(btnRed, INPUT);
 pinMode(btnBlue, INPUT);
 pinMode(btnGreen, INPUT);
 pinMode(btnPurple, INPUT);
 
 // initialize the LED as an output:
 // initialize serial communication:
 Serial.begin(9600);
 pixels.begin(); // INITIALIZE NeoPixel strip object (REQUIRED)
 pixels.clear(); // Set all pixel colors to 'off'
 pixels.show();
 delay(1000);
 
}
 
void loop() {
if (digitalRead(btnRed)==HIGH){
 rndRed();
 delay(100);
}
 
if (digitalRead(btnBlue)==HIGH){
 rndBlue();
 delay(100);
}
if (digitalRead(btnGreen)==HIGH){
 rndGreen();
 delay(100);
}
 
if (digitalRead(btnPurple)==HIGH){
 rndPurple();
 delay(100);
}
}
 
 
void rndRed() {
 int led = random(0, 15);
 pixels.setPixelColor(led, pixels.Color(255, 0, 0,0));
 pixels.show(); // Send the updated pixel colors to the hardware.
 delay(500);
}
 
void rndBlue() {
 int led = random(0, 9);
 pixels.setPixelColor(led, pixels.Color(0, 0, 255,0));
 pixels.show(); // Send the updated pixel colors to the hardware.
 delay(500);
 
}
 
void rndGreen() {
 int led = random(0, 9);
 pixels.setPixelColor(led, pixels.Color(0, 255, 0,0));
 pixels.show(); // Send the updated pixel colors to the hardware.
 delay(500);
 
}
 
void rndPurple() {
 int led = random(0, 9);
 pixels.setPixelColor(led, pixels.Color(171, 0, 255, 0));
 pixels.show(); // Send the updated pixel colors to the hardware.
 delay(500);
}

I am using a new library for the neo pixels but this has been downloaded and updated. Hopefully someone can help me!

Answer 1

loading libs from /Users/erinshankland/Documents/Arduino/libraries: reading dir /Users/erinshankland/Documents/Arduino/libraries: open /Users/erinshankland/Documents/Arduino/libraries: operation not permitted

This is not an Arduino problem but an OS problem.

Either your /Users/erinshankland/Documents/Arduino/libraries is not accessible by your user (check the permissions) or it's not a directory.

You can try, from a terminal:

sudo chown -R erinshankland /Users/erinshankland/Documents/Arduino/libraries
chmod -R 755 /Users/erinshankland/Documents/Arduino/libraries

which will reset ownership and file permissions on the directory and everything underneath it.

If not, then delete your libraries folder (which may in fact be a file, not a folder) and recreate it and repopulate it with your desired libraries.

• Erin Shankland: Thank you this worked! looked like it was a problem with my libraries!