[LogiLogi-list] rails problem

after "rake redo_dev_db --trace" i get this error:



rake db:fixtures:load_inc_config --trace

** Invoke db:fixtures:load_inc_config (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:fixtures:load_inc_config
rake aborted!
File Not Found Error occured at <except.c>:117 in xpop_context
Error occured in index.c:825 - sis_find_segments_file
        couldn't find segments file

/usr/local/lib/ruby/gems/1.8/gems/ferret-0.11.3/lib/ferret/index.rb:683:in
`initialize'
/usr/local/lib/ruby/gems/1.8/gems/ferret-0.11.3/lib/ferret/index.rb:683:in
`ensure_writer_open'
/usr/local/lib/ruby/gems/1.8/gems/ferret-0.11.3/lib/ferret/index.rb:268:in
`<<'
/usr/local/lib/ruby/gems/1.8/gems/ferret-0.11.3/lib/ferret/index.rb:8:in
`synchrolock'
....


any suggestion?