More detailed Perl script operation

Question

Perl

Good afternoon!
Little by little we are translating Ubuntu Manual and collecting PDF ( topic )
As a result of digging, it turned out that part of the translated text po4a-translate is not processed.
I'm trying to figure out where the error is.
po4a-translate -v -d didn't work.
I look inside the Perl script.
Added to it:

use diagnostics -verbose;
enable  diagnostics;

But I do not see a more detailed work of the script. How to make a perl script work in more detail? Thank you
Text below that is not processed

Answer 1

I answer to myself:
In the script I wrote this
#! /usr/bin/perl -d:Trace