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So this thing, “Servo.h.” That’s the thing we need to fix, and thanks to line 2, we know where to find it. It says, “servo.h: No such file or directory”.

Then we get to the smoking gun of the error.

The first number is usually the more helpful of the two because you can use it to locate the error in your sketch. The “19” is telling you the length of the line of code in spaces and characters. The “10” in this example is telling you the error occurred on line 10 of your sketch.

The second bit is what usually begins to confuse people, but it’s easy once you know.

The first bit, “knob,” is referring to the name of the program.

Line 2 begins to zero in on the problem.

It’s just describing the Arduino version in use, what operating system is running, and which board you have selected. Here it is, that pesky error in all its freshly pasted glory. To do that, just fire up your PC’s text editor and paste it into the blank screen. All we’re going to do is take a closer look at what the message is actually saying. For this situation, however, we can be a bit more basic. Or you could take advantage of the active Arduino community by asking for help in a forum. This copy feature is ridiculously useful. You could, for example, paste the error message into Google and learn more about the error.

You probably won’t fall off your chair to learn that by clicking that button, you just copied the error message from the little window at the bottom of The Serial Monitor’s UI to the clipboard of your computer. Of course there’s a file or directory! You just made the thing, and it’s right there, tucked inside a directory.īut hold up, let’s take a closer look. If you look at the bottom portion of the Arduino IDE where the error message shows up, there’s this handy little button that says “copy error messages.”Ĭlick on that now. At first glance, the no such file or directory error is particularly maddening because it seems to break that useful purpose rule. They do, however, serve a useful purpose by telling us something about what went wrong. We’ll show you what they are.Įrror messages can be such a pain. This is actually a pretty common problem, and there are two easy fixes that almost always work. If you’re trying to run an Arduino sketch but keep coming across the “no such file or directory” error, don’t worry. And once more, those maddening words, “no such file or directory,” stare back at you in hostile gaslighting mockery. “Nothing to worry about,” you mutter, sleep-starved and semi-delirious as you hit upload again. You hit upload, palms sweaty with anticipation to see all your hard work come to fruition. You’ve just spent three hours toiling on your next Arduino project, and FINALLY, you’re ready to give your sketch a whirl. Get 10 tips every new Arduino coder should know ➜