UndefVarError: not defined

New to Julia
3

You need to pass the filepath as a string:

julia> include(myfile.jl)
ERROR: UndefVarError: `myfile` not defined
Stacktrace:
 [1] top-level scope
   @ REPL[197]:1

julia> include("myfile.jl")
ERROR: SystemError: opening file "...\\myfile.jl": No such file or directory