Ferret talk - Apr 2007 - rename error using rebuild_index in console after searching

Hi,
I use ruby console to experiment acts_as_ferret, but I ran into file
rename error when I  try to rebuild index after doing a search.

is this normal?  I am using Ferret 0.10.9 in windows XP.

Loading development environment.
>> Address.rebuild_index
=> {}
>> Address.find_by_contents(''US'')
=> #<ActsAsFerret::SearchResults:0x4f2ffcc @total_hits=2,
@results=[#<Address:0x
4f30198 @ferret_score=0.106434106826782, @ferret_rank=1,
@attributes={"city"=>""
, "updated_at"=>"2007-04-16 01:32:40",
"zipcode"=>"11111",
"addressable_type"=>"
User", "country"=>"US",
"addressable_id"=>"1", "id"=>"1",
"line_1"=>"",
"line_2"
=>"", "created_at"=>"2007-03-19 22:06:04",
"state"=>"Alaska"}>,
#<Address:0x4f30
06c @ferret_score=0.106434106826782, @ferret_rank=2,
@attributes={"city"=>"san f
ran", "updated_at"=>"2007-04-01 16:32:43",
"zipcode"=>"94579",
"addressable_type
"=>"User", "country"=>"US",
"addressable_id"=>"4", "id"=>"4",
"line_1"=>"12", "l
ine_2"=>"", "created_at"=>"2007-03-25
14:44:35",
"state"=>"California"}>]>
>> Address.rebuild_index
IOError: IO Error occured:
couldn''t rename file
"./script/../config/../config/../index/development/address\
_3.tmp" to
"./script/../config/../config/../index/development/address\_3.cfs":
<
File exists>

        from
C:/InstantRails-1.6-win/ruby/lib/ruby/gems/1.8/gems/ferret-0.10.9-m
swin32/lib/ferret/index.rb:529:in `optimize''
        from
C:/InstantRails-1.6-win/ruby/lib/ruby/gems/1.8/gems/ferret-0.10.9-m
swin32/lib/ferret/index.rb:529:in `optimize''
        from C:/InstantRails-1.6-win/ruby/lib/ruby/1.8/monitor.rb:238:in
`synchr
onize''
        from
C:/InstantRails-1.6-win/ruby/lib/ruby/gems/1.8/gems/ferret-0.10.9-m
swin32/lib/ferret/index.rb:527:in `optimize''
        from
./script/../config/../config/../vendor/plugins/acts_as_ferret/lib/l
ocal_index.rb:51:in `rebuild_index''
        from
./script/../config/../config/../vendor/plugins/acts_as_ferret/lib/c
lass_methods.rb:15:in `rebuild_index''
        from (irb):3


Thanks.
yaxm

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