不知道发生了什么，所以这里是完整的跟踪：
Receiving schema
Schema: 0% | | ETA: --:--:--
Schema: 9% |=== | ETA: 00:00:15
Schema: 18% |======= | ETA: 00:00:12
Schema: 27% |=========== | ETA: 00:00:10
Schema: 36% |=============== | ETA: 00:00:09
Schema: 45% |================== | ETA: 00:00:08
Schema: 54% |====================== | ETA: 00:00:06
Schema: 63% |========================== | ETA: 00:00:05
Schema: 72% |============================== | ETA: 00:00:04
Schema: 81% |================================== | ETA: 00:00:02
Schema: 90% |===================================== | ETA: 00:00:01
Schema: 100% |==========================================| Time: 00:00:15
Receiving indexes
schema_migrat: 0% | | ETA: --:--:--
schema_migrat: 100% |==========================================| Time: 00:00:00
sections: 0% | | ETA: --:--:--
sections: 100% |==========================================| Time: 00:00:00
tweets: 0% | | ETA: --:--:--
tweets: 33% |============= | ETA: 00:00:01
tweets: 66% |=========================== | ETA: 00:00:00
tweets: 100% |==========================================| Time: 00:00:02
retweets: 0% | | ETA: --:--:--
retweets: 100% |==========================================| Time: 00:00:00
Receiving data
11 tables, 2,200 records
schema_migrat: 100% |==========================================| Time: 00:00:00
sections: 100% |==========================================| Time: 00:00:00
boxes: 100% |==========================================| Time: 00:00:00
sales_channel: 100% |==========================================| Time: 00:00:00
users: 100% |==========================================| Time: 00:00:00
settings: 100% |==========================================| Time: 00:00:00
admins: 100% |==========================================| Time: 00:00:00
entries: 100% |==========================================| Time: 00:00:00
tweets: 100% |==========================================| Time: 00:00:00
/Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sqlite3-1.3.3/lib/sqlite3/database.rb:91:in `initialize': SQLite3::SQLException: near ".": syntax error (Sequel::DatabaseError)
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sqlite3-1.3.3/lib/sqlite3/database.rb:91:in `new'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sqlite3-1.3.3/lib/sqlite3/database.rb:91:in `prepare'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sqlite3-1.3.3/lib/sqlite3/database.rb:223:in `execute_batch'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/adapters/sqlite.rb:130:in `block (2 levels) in _execute'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/database/logging.rb:28:in `log_yield'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/adapters/sqlite.rb:130:in `block in _execute'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/connection_pool/threaded.rb:71:in `hold'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/database/connecting.rb:226:in `synchronize'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/adapters/sqlite.rb:117:in `_execute'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/adapters/sqlite.rb:87:in `execute_dui'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/dataset/actions.rb:552:in `execute_dui'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/dataset/actions.rb:243:in `block (2 levels) in import'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/dataset/actions.rb:243:in `each'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/dataset/actions.rb:243:in `block in import'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/database/query.rb:223:in `_transaction'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/database/query.rb:209:in `block in transaction'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/connection_pool/threaded.rb:84:in `hold'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/database/connecting.rb:226:in `synchronize'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/database/query.rb:207:in `transaction'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/sequel-3.20.0/lib/sequel/dataset/actions.rb:243:in `import'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/taps-0.3.23/lib/taps/data_stream.rb:315:in `import_rows'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/taps-0.3.23/lib/taps/data_stream.rb:142:in `fetch_remote'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/taps-0.3.23/lib/taps/operation.rb:308:in `block in pull_data_from_table'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/taps-0.3.23/lib/taps/operation.rb:301:in `loop'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/taps-0.3.23/lib/taps/operation.rb:301:in `pull_data_from_table'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/taps-0.3.23/lib/taps/operation.rb:284:in `block in pull_data'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/taps-0.3.23/lib/taps/operation.rb:278:in `each'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/taps-0.3.23/lib/taps/operation.rb:278:in `pull_data'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/taps-0.3.23/lib/taps/operation.rb:253:in `block in run'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/taps-0.3.23/lib/taps/operation.rb:203:in `call'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/taps-0.3.23/lib/taps/operation.rb:203:in `catch_errors'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/taps-0.3.23/lib/taps/operation.rb:246:in `run'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/taps-0.3.23/lib/taps/cli.rb:171:in `clientxfer'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.3.6/lib/heroku/command/db.rb:191:in `taps_client'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.3.6/lib/heroku/command/db.rb:59:in `pull'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.3.6/lib/heroku/command.rb:114:in `run'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/gems/heroku-2.3.6/bin/heroku:14:in `<top (required)>'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/bin/heroku:19:in `load'
from /Users/justin/.rvm/gems/ruby-1.9.2-p136/bin/heroku:19:in `<main>'
显然，在我看来，tweets表格中存在问题，但我不知道它可能是什么，因为该应用程序在开发中工作并且在生产中的 heroku 上工作。
这是该表的架构：
create_table "tweets", :force => true do |t|
t.integer "authorization_id"
t.string "name"
t.string "screen_name"
t.string "uid"
t.integer "tid"
t.string "tid_string"
t.string "text"
t.integer "followers_count"
t.integer "statuses_count"
t.integer "friends_count"
t.integer "retweets_count"
t.datetime "created_at"
t.datetime "updated_at"
end
add_index "tweets", ["authorization_id"], :name => "index_tweets_on_authorization_id"
add_index "tweets", ["tid"], :name => "index_tweets_on_tid"
add_index "tweets", ["tid_string"], :name => "index_tweets_on_tid_string"
转推：
create_table "retweets", :force => true do |t|
t.integer "entry_id"
t.string "twitter_username"
t.datetime "tweet_date"
t.datetime "created_at"
t.datetime "updated_at"
t.string "twitter_user_id_str"
t.string "name"
t.integer "twitter_user_id"
t.integer "tweet_id"
t.string "tweet_id_str"
end
add_index "retweets", ["entry_id"], :name => "index_retweets_on_entry_id"