pert:
Try closing all Arduino IDE windows and then start the Arduino IDE and try again. That will clear the cache and hopefully fix the problem.
I all ready tried resetting the IDE with out any luck
Robin2:
Let's stick with that as it is a short program.Post the exact error message that the compiler produced when trying the Blink program.
Are you sure you have selected the correct board in the IDE?
Do you get a compiler error if you try to compile for an Uno?
...R
This is the same error as before. Here it is again
Arduino: 1.8.5 (Windows 10), Board: "Adafruit Feather M0"
GetFileAttributesEx C:\Users\Rocke\AppData\Local\Temp\arduino_cache_825726: The system cannot find the file specified.
Error compiling for board Adafruit Feather M0.
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
Yes I am using the correct board in the IDE "Adafruit Feather M0"
No I have not tried to compile for the Uno,