NoMethodError (undefined method `split' for nil:NilClass) error occured.

[xyz37]

redmine_mylyn_connector : stable-2.8 and redmine 2.2.3 below environments.

Ruby version    1.9.3 (i386-mingw32)
RubyGems version    1.8.24
Rack version    1.4
Rails version   3.2.12
JavaScript Runtime  JScript
Active Record version   3.2.12
Action Pack version 3.2.12
Active Resource version 3.2.12
Action Mailer version   3.2.12
Active Support version  3.2.12

and Eclipse is "Juno SR1"

then I create new query ok. but query with issue is error "Sever Error" and my redmine server logs are below.

NoMethodError (undefined method `split' for nil:NilClass):
  plugins/redmine_mylyn_connector/app/controllers/mylyn_connector/issues_controller.rb:70:in `list'
  actionpack (3.2.12) lib/action_controller/metal/implicit_render.rb:4:in `send_action'
  actionpack (3.2.12) lib/abstract_controller/base.rb:167:in `process_action'
  actionpack (3.2.12) lib/action_controller/metal/rendering.rb:10:in `process_action'
  actionpack (3.2.12) lib/abstract_controller/callbacks.rb:18:in `block in process_action'
  activesupport (3.2.12) lib/active_support/callbacks.rb:469:in `_run__165972908__process_action__640302218__callbacks'
  activesupport (3.2.12) lib/active_support/callbacks.rb:405:in `__run_callback'
  activesupport (3.2.12) lib/active_support/callbacks.rb:385:in `_run_process_action_callbacks'
  activesupport (3.2.12) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (3.2.12) lib/abstract_controller/callbacks.rb:17:in `process_action'
  actionpack (3.2.12) lib/action_controller/metal/rescue.rb:29:in `process_action'
  actionpack (3.2.12) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action'
  activesupport (3.2.12) lib/active_support/notifications.rb:123:in `block in instrument'
  activesupport (3.2.12) lib/active_support/notifications/instrumenter.rb:20:in `instrument'
  activesupport (3.2.12) lib/active_support/notifications.rb:123:in `instrument'
  actionpack (3.2.12) lib/action_controller/metal/instrumentation.rb:29:in `process_action'
  actionpack (3.2.12) lib/action_controller/metal/params_wrapper.rb:207:in `process_action'
  activerecord (3.2.12) lib/active_record/railties/controller_runtime.rb:18:in `process_action'
  actionpack (3.2.12) lib/abstract_controller/base.rb:121:in `process'
  actionpack (3.2.12) lib/abstract_controller/rendering.rb:45:in `process'
  actionpack (3.2.12) lib/action_controller/metal.rb:203:in `dispatch'
  actionpack (3.2.12) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch'
  actionpack (3.2.12) lib/action_controller/metal.rb:246:in `block in action'
  actionpack (3.2.12) lib/action_dispatch/routing/route_set.rb:73:in `call'
  actionpack (3.2.12) lib/action_dispatch/routing/route_set.rb:73:in `dispatch'
  actionpack (3.2.12) lib/action_dispatch/routing/route_set.rb:36:in `call'
  journey (1.0.4) lib/journey/router.rb:68:in `block in call'
  journey (1.0.4) lib/journey/router.rb:56:in `each'
  journey (1.0.4) lib/journey/router.rb:56:in `call'
  actionpack (3.2.12) lib/action_dispatch/routing/route_set.rb:601:in `call'
  rack-openid (1.3.1) lib/rack/openid.rb:98:in `call'
  actionpack (3.2.12) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
  rack (1.4.5) lib/rack/etag.rb:23:in `call'
  rack (1.4.5) lib/rack/conditionalget.rb:25:in `call'
  actionpack (3.2.12) lib/action_dispatch/middleware/head.rb:14:in `call'
  actionpack (3.2.12) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
  actionpack (3.2.12) lib/action_dispatch/middleware/flash.rb:242:in `call'
  rack (1.4.5) lib/rack/session/abstract/id.rb:210:in `context'
  rack (1.4.5) lib/rack/session/abstract/id.rb:205:in `call'
  actionpack (3.2.12) lib/action_dispatch/middleware/cookies.rb:341:in `call'
  activerecord (3.2.12) lib/active_record/query_cache.rb:64:in `call'
  activerecord (3.2.12) lib/active_record/connection_adapters/abstract/connection_pool.rb:479:in `call'
  actionpack (3.2.12) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
  activesupport (3.2.12) lib/active_support/callbacks.rb:405:in `_run__398002595__call__426587933__callbacks'
  activesupport (3.2.12) lib/active_support/callbacks.rb:405:in `__run_callback'
  activesupport (3.2.12) lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
  activesupport (3.2.12) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (3.2.12) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (3.2.12) lib/action_dispatch/middleware/reloader.rb:65:in `call'
  actionpack (3.2.12) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
  actionpack (3.2.12) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
  actionpack (3.2.12) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
  railties (3.2.12) lib/rails/rack/logger.rb:32:in `call_app'
  railties (3.2.12) lib/rails/rack/logger.rb:18:in `call'
  actionpack (3.2.12) lib/action_dispatch/middleware/request_id.rb:22:in `call'
  rack (1.4.5) lib/rack/methodoverride.rb:21:in `call'
  rack (1.4.5) lib/rack/runtime.rb:17:in `call'
  activesupport (3.2.12) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
  rack (1.4.5) lib/rack/lock.rb:15:in `call'
  actionpack (3.2.12) lib/action_dispatch/middleware/static.rb:62:in `call'
  railties (3.2.12) lib/rails/engine.rb:479:in `call'
  railties (3.2.12) lib/rails/application.rb:223:in `call'
  railties (3.2.12) lib/rails/railtie/configurable.rb:30:in `method_missing'
  rack (1.4.5) lib/rack/urlmap.rb:64:in `block in call'
  rack (1.4.5) lib/rack/urlmap.rb:49:in `each'
  rack (1.4.5) lib/rack/urlmap.rb:49:in `call'
  thin (1.5.0) lib/thin/connection.rb:81:in `block in pre_process'
  thin (1.5.0) lib/thin/connection.rb:79:in `catch'
  thin (1.5.0) lib/thin/connection.rb:79:in `pre_process'
  thin (1.5.0) lib/thin/connection.rb:54:in `process'
  thin (1.5.0) lib/thin/connection.rb:39:in `receive_data'
  eventmachine-1.0.0-x86 (mingw32) lib/eventmachine.rb:187:in `run_machine'
  eventmachine-1.0.0-x86 (mingw32) lib/eventmachine.rb:187:in `run'
  thin (1.5.0) lib/thin/backends/base.rb:63:in `start'
  thin (1.5.0) lib/thin/server.rb:159:in `start'
  thin (1.5.0) lib/thin/controllers/controller.rb:86:in `start'
  thin (1.5.0) lib/thin/runner.rb:187:in `run_command'
  thin (1.5.0) lib/thin/runner.rb:152:in `run!'
  thin (1.5.0) bin/thin:6:in `'
  D:/CI/Ruby/bin/thin:23:in `load'
  D:/CI/Ruby/bin/thin:23:in `
'

Correct this please...