HEREsounds an awful lot like a debug statement.
That was my thought as well.
On that note, it is possible (regardless of how unlikely) that perhaps you are executing an unexpected version of a module.
I find with home-spun modules in particular, different versions of Perl honor local directory vs. PERL5LIBreferences in different ways. I've run into the situation where I'd make a change to a module whilst testing/refactoring it, and at some point I'd have a copy in the PERL5LIBas well as the local directory, and Perl was loading the version I wasn't expecting. Really messes with your head until you figure it out.
If a copy of one of your modules is displaying HEREas part of a previous debugging/tracing effort, it's possible Perl is loading that version instead of the one you're examining.
It's an outside chance, but one I've personally encountered (more than once, I embarrassingly admit). Just thought I'd throw that out there, in case.
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