Use of uninitialized value $name in lc at /usr/share/perl5/Biber/SortList.pm line 87.

Use of uninitialized value $lssn in concatenation (.) or string at /usr/share/perl5/Biber.pm line 682. Use of uninitialized value $lname in concatenation (.) or string at /usr/share/perl5/Biber.pm line 682.

INFO - This is Biber 2.0 (beta) INFO - Logfile is 'These.blg' INFO - Reading 'These.bcf' WARN - Warning: Found biblatex control file version 2.5, expected version 2.6 INFO - Found 84 citekeys in bib section 0 INFO - Processing section 0 INFO - Looking for bibtex format file './partie2/biblio-partie2.bib' for section 0 INFO - Decoding LaTeX character macros into UTF-8 INFO - Found BibTeX data source './partie2/biblio-partie2.bib'