An interesting in the ProtonIde.

[zuisti]

If the include file has the same name as the program's file name (eg myprog.bas - myprog.inc),
and there is an error in the program, the ProtonIde does not show the exact position of, just a
generic error message comes ("compile error"). And perhaps a long time to search for the mistake 

Always use different names (eg myprog.bas - my_progr.inc).