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Library Not Found

Arduino Microcontroller Board

Severity: Moderate

Source: OnlyErrorCodes.com — Every error code. One place.

Arduino Library Not Found — How to Fix

What Does This Error Mean?

Arduino library not found means the IDE cannot locate a library your sketch requires. Open the Library Manager (Sketch > Include Library > Manage Libraries), search for the library by name, and click Install.

Affected Models

  • Arduino Uno
  • Arduino Nano
  • Arduino Mega 2560
  • Arduino Leonardo
  • Arduino Pro Mini
  • Arduino clones

Common Causes

  • Library not installed — first time using a sketch from a tutorial
  • Library installed in the wrong location (wrong IDE version folder)
  • Library name in the #include statement does not exactly match the installed folder name
  • Library installed manually but folder structure is incorrect
  • Library requires another library as a dependency

How to Fix It