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This question already has an answer here:

On MacOs X running updated mactex packages, when I compile my biber file I get this error:

data source /var/folders/yf/y69gwrx12kj2jtzrs78vg2vm0000gn/T/par-67696f6e61/cache-    23e542f078c05cf97a78083ff4d628bc746d389d/inc/lib/Biber/LaTeX/recode_data.xml not found in .
Compilation failed in require at Biber/Utils.pm line 20.
BEGIN failed--compilation aborted at Biber/Utils.pm line 20.
Compilation failed in require at Biber/Internals.pm line 8.
BEGIN failed--compilation aborted at Biber/Internals.pm line 8.
Compilation failed in require at (eval 22) line 2.
...propagated at /opt/local/lib/perl5/5.14.1/base.pm line 94.
BEGIN failed--compilation aborted at Biber.pm line 5.
Compilation failed in require at script/biber-darwin line 20.
BEGIN failed--compilation aborted at script/biber-darwin line 20.

Any idea on how to solve it?

marked as duplicate by Guido, Svend Tveskæg, Andrew Swann, Claudio Fiandrino, jubobs Jan 8 '14 at 17:03

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

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    It's very easy to solve it, actually. :) Remove the problematic folder (the one with /var/folders/yf/y69gw...) and run biber again. :) – Paulo Cereda Nov 30 '12 at 14:43
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    As Paulo said, this is usually due to interrupting biber on its first run (of a new version) so that it doesn't unpack properly. Just delete this folder: /var/folders/yf/y69gwrx12kj2jtzrs78vg2vm0000gn/T/par-67696f6e61 and run biber again once without interrupting it (just with no arguments for example) to make sure it unpacks correctly. – PLK Nov 30 '12 at 18:20
  • I had different folders (no yf) under /var/folders/, but I just ran a sudo rm -R * and it solved my problem. Thanks. – Jonathan Komar Feb 10 '13 at 11:26
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    I also found this answer helpful... and the exact answer from @PLK sorted me out. So, I don't think it's too localized - though perhaps the wording of the question is overly localized. – Dav Clark Jun 30 '13 at 2:01
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    12 upvotes — please reopen and accept Paulo's solution? – Neil G Jan 8 '14 at 9:18