Having this error- Arduino: 1.8.8 Hourly Build 2018/11/30 12:33 (Windows 10), Board: "Arduino/Genuino Uno"

open sketch\LCD.ino.cpp: Access is denied. Error compiling for board Arduino/Genuino Uno.

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

1 Answer 1


High likely one of the intermediate/binary files is in use. For example:

  • When you have it already opened in a debug session
  • Having it opened in multiple instances of your IDE
  • Having it opened in another application
  • Having closed an application that locked the intermediate/binary file(s).

What you can do:

  • Close the debug session
  • Close all applications related to the project
  • Restart your computer

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