Error verifying/uploading to arduino

[markd833]

@impedro07

arduino5/bin/../lib/gcc/avr/7.3.0/../../../../avr/lib/avrxmega3/crtatmega4809.o:../../../../crt1/gcrt1.S:310: undefined reference to `main'
collect2.exe: error: ld returned 1 exit status

exit status 1

Compilation error: exit status 1

This looks like a build error rather than anything to do with your actual board. This discussion may help you:

Arduino 2.0 Error - undefined reference to `main' Compilation error: exit status 1

I installed the latest Arduino 2.0 and noticed a bug, probably. The newest IDE requires you to select a board when compiling a sketch. I promptly selects Arduino Nano and it has been working perfectly fine but somehow whenever I change it to Arduino Uno, I'll get this error. [image] Out of curiousity, I tried every single AVR boards available and needless to say every board works except only Arduino Uno [image] But why is that? Is this a bug? and how to fix this error.