The documentation has a section for Diagnostics and Using a Devel::REPL shell. I guess you could also use something like Wireshark to montior what's going on, and compare differences between the modules vs manual connections.

See also perldebug and Debugging and Optimization from the tutorials section.

In reply to Re: How to debug a perl module by marto
in thread How to debug a perl module by rich_d_thomas

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