http://www.perlmonks.org?node_id=1047651


in reply to RE: Re: Tk and -w
in thread Tk and -w

i think its rather safe to say this is not the trouble.

I think it's safe to say that this is quite probably the problem, and that the OP is running on Windows, whose file system is case-insensitive, with confusing errors for those who mess up the case of their use statements.