Use of uninitialized value in string eq at /usr/lib/perl5/5.6.1/i586-linux/B/Xref.pm line 117.
Use of uninitialized value in substitution (s///) at /usr/lib/perl5/5.6.1/i586-linux/B/Xref.pm line 124.
Use of uninitialized value in string eq at /usr/lib/perl5/5.6.1/i586-linux/B/Xref.pm line 117.
Use of uninitialized value in substitution (s///) at /usr/lib/perl5/5.6.1/i586-linux/B/Xref.pm line 124.
Use of uninitialized value in concatenation (.) or string at /usr/lib/perl5/5.6.1/i586-linux/B/Xref.pm line 130.
Use of uninitialized value in string eq at /usr/lib/perl5/5.6.1/i586-linux/B/Xref.pm line 117.
etc. etc. (cut for node readability)
Use of uninitialized value in substitution (s///) at /usr/lib/perl5/5.6.1/i586-linux/B/Xref.pm line 124.
Use of uninitialized value in concatenation (.) or string at /usr/lib/perl5/5.6.1/i586-linux/B/Xref.pm line 130.
Use of uninitialized value in concatenation (.) or string at /usr/lib/perl5/5.6.1/i586-linux/B/Xref.pm line 130.