The current version of Perl is 5.28 and the current version of Devel::NYTProf is 6.06. Perl 5.8.8 is over 10 years old and Devel::NYTProf 2.02 is almost 10 years old.

My recommendation is that you try first upgrading both, Perl and Devel::NYTProf to a more recent version to see whether the problem you encounter was addressed.