exception error: no match of right hand side value {error,enoent}

Install couchbaseserver 2.0.0dp4r-717 on windows 2008 R2 64 bit.
Run view test test_get_view_during_x_min_load_y_working_set,num-docs=10000,load-time=5,run-view-time=0
The test failed and system was in unstable state. Default bucket can be deleted and created but default bucket does not in stable state.
Try to restart memcached process but no help.
Try to restart couchbase server ==> default bucket is still in unstable state.

Following are errors from the test.
012-02-27 18:34:44,252 - root - INFO - key_set has 928 elements
2012-02-27 18:34:44,253 - root - INFO - view returned 928 rows
2012-02-27 18:34:49,259 - root - INFO - 113.984292984 seconds has passed ....
2012-02-27 18:34:49,260 - root - INFO - Params

{'connection_timeout': 60000, 'full_set': True}

2012-02-27 18:34:49,260 - root - INFO - index query url: http://10.1.1.174:8091/couchBase/default/_design/dev_test_view_on_10000_docs-5366193/_view/dev_test_view_on_10000_docs-5366193?limit=37&connection_timeout=60000&full_set=true
2012-02-27 18:34:49,291 - root - ERROR - http://10.1.1.174:8091/couchBase/default/_design/dev_test_view_on_10000_docs-5366193/_view/dev_test_view_on_10000_docs-5366193?limit=37&connection_timeout=60000&full_set=true error 500 reason: kill {"error":"kill","reason":"{gen_server,call,\n [couch_server,\n {open,<<\"default/master\">>,\n [{user_ctx,{user_ctx,null,[<<\"_admin\">>],undefined}}]},\n infinity]}"}

2012-02-27 18:34:49,292 - root - ERROR - view_results not ready yet , try again in 10 seconds... , error unable to obtain view results
2012-02-27 18:34:49,965 - root - ERROR - unable to set item to bucket default, error Memcached error #132
2012-02-27 18:34:49,970 - root - ERROR - unable to set item to bucket default, error Memcached error #132
2012-02-27 18:34:49,974 - root - ERROR - unable to set item to bucket default, error Memcached error #132
2012-02-27 18:34:49,978 - root - ERROR - unable to set item to bucket default, error Memcached error #132
2012-02-27 18:34:50,023 - root - ERROR - unable to set item to bucket default, error Memcached error #132
2012-02-27 18:34:50,027 - root - ERROR - unable to set item to bucket default, error Memcached error #132
2012-02-27 18:34:50,032 - root - ERROR - unable

From diag log:

crasher:
initial call: couch_file:spawn_writer/2
pid: <0.26883.3>
registered_name: []
exception error: no match of right hand side value

{error,enoent}

in function couch_file:handle_write_message/5
ancestors: [<0.26881.3>,<0.20174.3>,<0.20173.3>,<0.20167.3>]
messages: []
links: <0.26881.3>,#Port<0.152905>
dictionary: []
trap_exit: true
status: running
heap_size: 610
stack_size: 24
reductions: 1147
neighbours:

[couchdb:info] [2012-02-27 18:34:39] [ns_1@10.1.1.174:couch_server:couch_log:error:42] Unexpected message, restarting couch_server: {'EXIT',
<0.20173.3>,
{{write_loop_died,
{badmatch,

{error, enoent}

}},
{gen_server,
call,
[<0.26881.3>,

{rename, "c:/t1/bin/./var/lib/couchdb/default/255.couch.2"}

,
infinity]}}}
[couchdb:info] [2012-02-27 18:34:39] [ns_1@10.1.1.174:<0.18594.3>:couch_log:info:39] Shutting down couch_db_set for set `default` because partition `default/255` died with reason: {{write_loop_died,
{badmatch,

{error, enoent}

}},
{gen_server,
call,
[<0.26881.3>,

{rename, "c:/t1/bin/./var/lib/couchdb/default/255.couch.2"}

,
infinity]}}
[ns_server:error] [2012-02-27 18:34:39] [ns_1@10.1.1.174:<0.720.0>:couchbase_compaction_daemon:compact_vbucket:247] Compaction daemon - an error occurred while compacting the database `default/255`: shutdown
@