I have a strange error and cannot fathom what it means.. Help anyone?

The code is simple morse code keyer. It’s works just fine on an Arduino Uno but I get a strange error message when I try to verify it on my core.
The error is “make: *** No rule to make target m0xpd_keyer_w/spd_ctrl.o', needed by2252856ca2dfab50a6f0b95bcb6d26e50ec72af7ee6927129f48df5bcfd6.elf’. Stop.”


What dev env are you using?
What does your code look like?
Where have you got the library from?

Infos like this may help understand your problem to start with :wink: