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filesize(path...)
Equivalent to stat(file).size.
If you use stat you can see, if the path is correct:
julia> stat("path/to/my/file/myfile")
StatStruct(mode=0o000000, size=0)
as expected for this example. But for something existing:
julia> stat("c:\\Temp\\Test2.jl")
StatStruct(mode=0o100666, size=296)