arduini no such file or directory : in arduino ide 1.8.7 i pasted an old progect into the directory "sketch_system1", my .ino file is sketch_system1.ino, all the headers and c++ file are into the same directory as .ino file. When I try to compile I get this error:

Arduino:1.8.7 (Linux), Scheda:"Arduino/Genuino Uno"

sketch_system1:1:23: error: LumSensor.h: No such file or directory
compilation terminated.
exit status 1
LumSensor.h: No such file or directory

Questo report potrebbe essere più ricco di informazioni abilitando l'opzione
"Mostra un output dettagliato durante la compilazione"
in "File -> Impostazioni"
