Thanks for your comment. I agree that Template Toolkit (or TT2 as it is frequently known) is nice, and for a new project I would use it, or go all the way and use Catalyst, Plack or suchlike.

The problem is that this is an old project and I can't refactor the code because I don't have a clear idea of what alot of it does. The approach I finally took was a combination of the Eclipse EPIC debugger, printf debugging to insert debug messages into the generated HTML, and the plain old perl debugger where I watch html fragments printed into my console as I debug interactively.

Brothers I thank you.