there seem to be extra spaces in the pasted string $ # {$ self -> {oligo_ref}} compared to the original $#{ $self->{oligo_ref} }

If you click on the [download] link under debug code you will be able to copy-paste safely.

In reply to Re^5: Use of uninitialized value in subroutine entry at /home/roarce/perl5/perlbrew/perls/perl-5.28.0/lib/site_perl/5.28.0/Seeder/Finder.pm line 476, <IN> line 8192. by bliako
in thread Use of uninitialized value in subroutine entry at /home/roarce/perl5/perlbrew/perls/perl-5.28.0/lib/site_perl/5.28.0/Seeder/Finder.pm line 476, <IN> line 8192. by roarce92

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