The advice given by ikegami was informing one but not relevant to solution.

Actually, it was spot on. I arrived to the conclusion that your Perl script wasn't being executed by perl, and that was indeed the case.

I even mentioned the shebang line at one point, and you assured me that "of course" you script was fine.

I already knew at that point that the script wasn't executed at all because if ti did the carp module would produce a perl error. As for the shebang line i though you were refering to '#!/usr/bin/perl' which i did had correctly at my script in terms of existence and correct apth. I had no idea that before that is hould had a line '#!' before the shebang line, which io just tried and didn't work for me.

I already knew at that point that the script wasn't executed at all because if ti did the carp module would produce a perl error.

Why didn't you let us know you had determined that? That also means you knew you were asking questions that have nothing to do with Perl.

As for the shebang line i though you were refering to '#!/usr/bin/perl'

I was.

I had no idea that before that is hould had a line '#!' before the shebang line,

That makes no sense. It's not a shebang line if there's anything before it.