Led matrix #3
Description
Any ideas why this error code is coming up? Apologies if it is completely obvious, I've just started with Arduino.
Arduino: 1.6.13 (Windows 10), Board: "Arduino/Genuino Uno"
c:\program files (x86)\arduino\hardware\tools\avr\bin../lib/gcc/avr/4.9.2/../../../../avr/bin/ar.exe: unable to rename 'core\core.a'; reason: Permission denied
exit status 1
Error compiling for board Arduino/Genuino Uno.
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