と思ったら、日本語ロケール生成用のスクリプトがエラー出す。誰か助けて。

./packunpack.rb:157:in `block (2 levels) in read': undefined method `size' for nil:NilClass (NoMethodError)
from ./packunpack.rb:143:in `each'
from ./packunpack.rb:143:in `with_index'
from ./packunpack.rb:143:in `block in read'
from ./packunpack.rb:139:in `open'
from ./packunpack.rb:139:in `read'
from ./packunpack.rb:30:in `initialize'
from ./packunpack.rb:321:in `new'
from ./packunpack.rb:321:in `<main>'

ファイルは↓より
http://www.dotup.org/uploda/www.dotup.org531868.zip.html
パス: skylines