imagem refinerycms não carregando - erro de libélula

Eu estou trabalhando no desenvolvimento de um aplicativo rails refinerycms que estava funcionando bem localmente e agora eu mudei para o meu VPS e eu estava tendo problemas com imagens que eu carreguei através de refinerycms não carregando e eu tenho lido que eu precisava para atualizar minha versão do imagemagick. Eu atualizei de 6.2.8 para 6.7.8. Agora todas as imagens são carregadas em algumas páginas, mas não no lado do administrador.

O que está causando esse problema? Aqui está o stacktrace do erro.

Dragonfly::Shell::CommandFailed (Command failed (convert '/var/www/vhosts/tomstestsite.us/PersonalTrainingKT/public/system/refinery/images/2012/06/03/16_36_48_339_pamLemke_after.jpg' '-resize' '225x255>' '/tmp/dragonfly20120705-7812-1xb3pce') with exit status 127):
  dragonfly (0.9.12) lib/dragonfly/shell.rb:29:in `raise_shell_command_failed'
  dragonfly (0.9.12) lib/dragonfly/shell.rb:23:in `run'
  dragonfly (0.9.12) lib/dragonfly/image_magick/utils.rb:17:in `convert'
  dragonfly (0.9.12) lib/dragonfly/image_magick/processor.rb:103:in `convert'
  dragonfly (0.9.12) lib/dragonfly/image_magick/processor.rb:27:in `resize'
  dragonfly (0.9.12) lib/dragonfly/image_magick/processor.rb:87:in `thumb'
  dragonfly (0.9.12) lib/dragonfly/function_manager.rb:39:in `call'
  dragonfly (0.9.12) lib/dragonfly/function_manager.rb:39:in `block (2 levels) in call_last'
  dragonfly (0.9.12) lib/dragonfly/function_manager.rb:38:in `catch'
  dragonfly (0.9.12) lib/dragonfly/function_manager.rb:38:in `block in call_last'
  dragonfly (0.9.12) lib/dragonfly/function_manager.rb:37:in `each'
  dragonfly (0.9.12) lib/dragonfly/function_manager.rb:37:in `call_last'
  dragonfly (0.9.12) lib/dragonfly/processor.rb:5:in `process'
  dragonfly (0.9.12) lib/dragonfly/job.rb:79:in `apply'
  dragonfly (0.9.12) lib/dragonfly/job.rb:253:in `block in apply'
  dragonfly (0.9.12) lib/dragonfly/job.rb:253:in `each'
  dragonfly (0.9.12) lib/dragonfly/job.rb:253:in `apply'
  dragonfly (0.9.12) lib/dragonfly/response.rb:25:in `to_response'
  dragonfly (0.9.12) lib/dragonfly/server.rb:43:in `block in call'
  dragonfly (0.9.12) lib/dragonfly/server.rb:39:in `catch'
  dragonfly (0.9.12) lib/dragonfly/server.rb:39:in `call'
  dragonfly (0.9.12) lib/dragonfly/middleware.rb:11:in `call'
  rack-cache (1.2) lib/rack/cache/context.rb:136:in `forward'
  rack-cache (1.2) lib/rack/cache/context.rb:245:in `fetch'
  rack-cache (1.2) lib/rack/cache/context.rb:185:in `lookup'
  rack-cache (1.2) lib/rack/cache/context.rb:66:in `call!'
  rack-cache (1.2) lib/rack/cache/context.rb:51:in `call'
  rack-cache (1.2) lib/rack/cache/context.rb:136:in `forward'
  rack-cache (1.2) lib/rack/cache/context.rb:245:in `fetch'
  rack-cache (1.2) lib/rack/cache/context.rb:185:in `lookup'
  rack-cache (1.2) lib/rack/cache/context.rb:66:in `call!'
  rack-cache (1.2) lib/rack/cache/context.rb:51:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/reloader.rb:65:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
  railties (3.2.3) lib/rails/rack/logger.rb:26:in `call_app'
  railties (3.2.3) lib/rails/rack/logger.rb:16:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/request_id.rb:22:in `call'
  rack (1.4.1) lib/rack/methodoverride.rb:21:in `call'
  rack (1.4.1) lib/rack/runtime.rb:17:in `call'
  activesupport (3.2.3) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
  rack (1.4.1) lib/rack/lock.rb:15:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/static.rb:62:in `call'
  railties (3.2.3) lib/rails/engine.rb:479:in `call'
  railties (3.2.3) lib/rails/application.rb:220:in `call'
  railties (3.2.3) lib/rails/railtie/configurable.rb:30:in `method_missing'
  passenger (3.0.11) lib/phusion_passenger/rack/request_handler.rb:96:in `process_request'
  passenger (3.0.11) lib/phusion_passenger/abstract_request_handler.rb:513:in `accept_and_process_next_request'
  passenger (3.0.11) lib/phusion_passenger/abstract_request_handler.rb:274:in `main_loop'
  passenger (3.0.11) lib/phusion_passenger/classic_rails/application_spawner.rb:321:in `start_request_handler'
  passenger (3.0.11) lib/phusion_passenger/classic_rails/application_spawner.rb:275:in `block in handle_spawn_application'
  passenger (3.0.11) lib/phusion_passenger/utils.rb:479:in `safe_fork'
  passenger (3.0.11) lib/phusion_passenger/classic_rails/application_spawner.rb:270:in `handle_spawn_application'
  passenger (3.0.11) lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
  passenger (3.0.11) lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
  passenger (3.0.11) lib/phusion_passenger/abstract_server.rb:180:in `start'
  passenger (3.0.11) lib/phusion_passenger/classic_rails/application_spawner.rb:149:in `start'
  passenger (3.0.11) lib/phusion_passenger/spawn_manager.rb:219:in `block (2 levels) in spawn_rails_application'
  passenger (3.0.11) lib/phusion_passenger/abstract_server_collection.rb:132:in `lookup_or_add'
  passenger (3.0.11) lib/phusion_passenger/spawn_manager.rb:214:in `block in spawn_rails_application'
  passenger (3.0.11) lib/phusion_passenger/abstract_server_collection.rb:82:in `block in synchronize'
  <internal:prelude>:10:in `synchronize'
  passenger (3.0.11) lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
  passenger (3.0.11) lib/phusion_passenger/spawn_manager.rb:213:in `spawn_rails_application'
  passenger (3.0.11) lib/phusion_passenger/spawn_manager.rb:132:in `spawn_application'
  passenger (3.0.11) lib/phusion_passenger/spawn_manager.rb:275:in `handle_spawn_application'
  passenger (3.0.11) lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
  passenger (3.0.11) lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
  passenger (3.0.11) helper-scripts/passenger-spawn-server:99:in `<main>'

ATUALIZAR

Eu adicionei o código abaixo ao meu arquivo config / application.rb como sugeridoAqui e isso ajudou alguns dos arquivos a aparecer, mas ainda não consigo carregar um arquivo através do aplicativo e parte deste stacktrace é mostrada abaixo.

config / application.rb contém este

initializer 'override-image-magick-paths', :after => 'attach-refinery-images-with-
    dragonfly' do
      app=Dragonfly[:refinery_images]
      app.configure_with(:imagemagick)
      app.configure do |c|
        c.convert_command = "/usr/local/bin/convert"          # defaults to "convert"
        c.identify_command = "/usr/local/bin/identify"        # defaults to "identify"
      end
    end

stacktrace

 Dragonfly::Shell::CommandFailed (Command failed (identify '/tmp/RackMultipart20120708-20096-4m1k9j') with exit status 127):
      dragonfly (0.9.12) lib/dragonfly/shell.rb:29:in `raise_shell_command_failed'
      dragonfly (0.9.12) lib/dragonfly/shell.rb:23:in `run'
      dragonfly (0.9.12) lib/dragonfly/image_magick/utils.rb:34:in `raw_identify'
      dragonfly (0.9.12) lib/dragonfly/image_magick/utils.rb:24:in `identify'
      dragonfly (0.9.12) lib/dragonfly/image_magick/analyser.rb:44:in `format'
      dragonfly (0.9.12) lib/dragonfly/function_manager.rb:39:in `call'
      dragonfly (0.9.12) lib/dragonfly/function_manager.rb:39:in `block (2 levels) in call_last'
      dragonfly (0.9.12) lib/dragonfly/function_manager.rb:38:in `catch'
      dragonfly (0.9.12) lib/dragonfly/function_manager.rb:38:in `block in call_last'
      dragonfly (0.9.12) lib/dragonfly/function_manager.rb:37:in `each'
      dragonfly (0.9.12) lib/dragonfly/function_manager.rb:37:in `call_last'
      dragonfly (0.9.12) lib/dragonfly/analyser.rb:25:in `analyse'
      dragonfly (0.9.12) lib/dragonfly/job.rb:247:in `analyse'

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