collect2.exe: error: ld returned 1 exit status exit status 1 Error compiling for board Arduino/Genuino Uno. Occurs: Compile of my own code and also 'dump' and 'comboDump' example programs Description: ...

Though the problem seems to be specifically about the NavKey which I'm not using. If I delete I2CNavKey.h and I2CNavKey.cpp from the folder in my library, then it DOES work I guess that should ...