nemuiDoc: Program Error: Errno::EINVAL

Invalid argument - ./cache/revlink
./aswiki/revlink.rb:9:in `initialize'
./aswiki/revlink.rb:9:in `new'
./aswiki/revlink.rb:9:in `initialize'
./aswiki/pagedata.rb:123:in `new'
./aswiki/pagedata.rb:123:in `revlinks'
/usr/lib/ruby/vendor_ruby/amrita/parts.rb:23:in `__send__'
/usr/lib/ruby/vendor_ruby/amrita/parts.rb:23:in `amrita_get_data'
/usr/lib/ruby/vendor_ruby/amrita/compiler.rb:373:in `get_data_from_dictionary'
(eval):266:in `amrita_expand_and_format1'
/usr/lib/ruby/vendor_ruby/amrita/compiler.rb:355:in `filter_nil_and_enum'
(eval):246:in `amrita_expand_and_format1'
(eval):12:in `amrita_expand_and_format'
/usr/lib/ruby/vendor_ruby/amrita/format.rb:318:in `format_element'
/usr/lib/ruby/vendor_ruby/amrita/format.rb:186:in `with_stream'
/usr/lib/ruby/vendor_ruby/amrita/format.rb:312:in `format_element'
(eval):11:in `amrita_expand_and_format'
(eval):231:in `expand'
/usr/lib/ruby/vendor_ruby/amrita/compiler.rb:355:in `filter_nil_and_enum'
(eval):221:in `expand'
/usr/lib/ruby/vendor_ruby/amrita/compiler.rb:355:in `filter_nil_and_enum'
(eval):202:in `expand'
/usr/lib/ruby/vendor_ruby/amrita/template.rb:139:in `do_expand'
/usr/lib/ruby/vendor_ruby/amrita/template.rb:118:in `expand'
./aswiki/page.rb:19:in `initialize'
./aswiki/handler.rb:30:in `new'
./aswiki/handler.rb:30:in `initialize'
aswiki.cgi:45:in `new'
aswiki.cgi:45