Can not generate PDF or txt format comparison report

Issue

• Can not generate PDF or txt format comparasion report
• Error:"no implicit conversion of Symbol into Integer" is thrown.see attached screenshot.

[----] I, [2016-06-13T03:03:01.750114 #3000:f418e8]  INFO -- : Started GET "/vm_infra/compare_to_pdf" for 127.0.0.1 at 2016-06-13 03:03:01 -0400
[----] I, [2016-06-13T03:03:01.752572 #3000:f418e8]  INFO -- : Processing by VmInfraController#compare_to_pdf as HTML
[----] F, [2016-06-13T03:03:01.975443 #3000:f418e8] FATAL -- : Error caught: [TypeError] no implicit conversion of Symbol into Integer
/var/www/miq/vmdb/app/controllers/application_controller/compare.rb:392:in `[]'
/var/www/miq/vmdb/app/controllers/application_controller/compare.rb:392:in `block (2 levels) in prepare_data_for_compare_or_drift_report'
/var/www/miq/vmdb/app/controllers/application_controller/compare.rb:389:in `each'
/var/www/miq/vmdb/app/controllers/application_controller/compare.rb:389:in `block in prepare_data_for_compare_or_drift_report'
/var/www/miq/vmdb/app/controllers/application_controller/compare.rb:297:in `each'
/var/www/miq/vmdb/app/controllers/application_controller/compare.rb:297:in `each_slice'
/var/www/miq/vmdb/app/controllers/application_controller/compare.rb:297:in `prepare_data_for_compare_or_drift_report'
/var/www/miq/vmdb/app/controllers/application_controller/compare.rb:412:in `create_compare_or_drift_report'
/var/www/miq/vmdb/app/controllers/application_controller/compare.rb:437:in `create_compare_report'
/var/www/miq/vmdb/app/controllers/application_controller/compare.rb:268:in `compare_to_pdf'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_controller/metal/basic_implicit_render.rb:4:in `send_action'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/abstract_controller/base.rb:181:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_controller/metal/rendering.rb:30:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/abstract_controller/callbacks.rb:20:in `block in process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/activesupport/lib/active_support/callbacks.rb:126:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/activesupport/lib/active_support/callbacks.rb:126:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/activesupport/lib/active_support/callbacks.rb:506:in `block (2 levels) in compile'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/activesupport/lib/active_support/callbacks.rb:455:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/activesupport/lib/active_support/callbacks.rb:455:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/activesupport/lib/active_support/callbacks.rb:101:in `__run_callbacks__'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/activesupport/lib/active_support/callbacks.rb:750:in `_run_process_action_callbacks'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/activesupport/lib/active_support/callbacks.rb:90:in `run_callbacks'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/abstract_controller/callbacks.rb:19:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_controller/metal/rescue.rb:20:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/activesupport/lib/active_support/notifications.rb:164:in `block in instrument'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/activesupport/lib/active_support/notifications/instrumenter.rb:21:in `instrument'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/activesupport/lib/active_support/notifications.rb:164:in `instrument'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_controller/metal/params_wrapper.rb:248:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/activerecord/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/abstract_controller/base.rb:126:in `process'
/opt/rh/cfme-gemset/gems/actionview-5.0.0.rc1/lib/action_view/rendering.rb:30:in `process'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_controller/metal.rb:190:in `dispatch'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_controller/metal.rb:262:in `dispatch'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_dispatch/routing/route_set.rb:50:in `dispatch'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_dispatch/routing/route_set.rb:32:in `serve'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_dispatch/journey/router.rb:39:in `block in serve'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_dispatch/journey/router.rb:26:in `each'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_dispatch/journey/router.rb:26:in `serve'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_dispatch/routing/route_set.rb:725:in `call'
/opt/rh/cfme-gemset/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:186:in `call!'
/opt/rh/cfme-gemset/gems/omniauth-1.3.1/lib/omniauth/strategy.rb:164:in `call'
/opt/rh/cfme-gemset/gems/omniauth-1.3.1/lib/omniauth/builder.rb:63:in `call'
/opt/rh/cfme-gemset/gems/secure_headers-3.0.3/lib/secure_headers/middleware.rb:10:in `call'
/opt/rh/cfme-gemset/gems/rack-2.0.0.rc1/lib/rack/etag.rb:25:in `call'
/opt/rh/cfme-gemset/gems/rack-2.0.0.rc1/lib/rack/conditional_get.rb:25:in `call'
/opt/rh/cfme-gemset/gems/rack-2.0.0.rc1/lib/rack/head.rb:12:in `call'
/opt/rh/cfme-gemset/gems/rack-2.0.0.rc1/lib/rack/session/abstract/id.rb:222:in `context'
/opt/rh/cfme-gemset/gems/rack-2.0.0.rc1/lib/rack/session/abstract/id.rb:216:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_dispatch/middleware/cookies.rb:613:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_dispatch/middleware/callbacks.rb:38:in `block in call'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/activesupport/lib/active_support/callbacks.rb:97:in `__run_callbacks__'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/activesupport/lib/active_support/callbacks.rb:750:in `_run_call_callbacks'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/activesupport/lib/active_support/callbacks.rb:90:in `run_callbacks'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_dispatch/middleware/callbacks.rb:36:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_dispatch/middleware/remote_ip.rb:79:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb:49:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'
/opt/rh/cfme-gemset/gems/railties-5.0.0.rc1/lib/rails/rack/logger.rb:36:in `call_app'
/opt/rh/cfme-gemset/gems/railties-5.0.0.rc1/lib/rails/rack/logger.rb:26:in `call'
/opt/rh/cfme-gemset/gems/request_store-1.3.1/lib/request_store/middleware.rb:9:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_dispatch/middleware/request_id.rb:24:in `call'
/opt/rh/cfme-gemset/gems/rack-2.0.0.rc1/lib/rack/method_override.rb:22:in `call'
/opt/rh/cfme-gemset/gems/rack-2.0.0.rc1/lib/rack/runtime.rb:22:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/activesupport/lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
/opt/rh/cfme-gemset/bundler/gems/rails-61b074f40164/actionpack/lib/action_dispatch/middleware/executor.rb:12:in `call'
/opt/rh/cfme-gemset/gems/rack-2.0.0.rc1/lib/rack/sendfile.rb:111:in `call'
/opt/rh/cfme-gemset/gems/railties-5.0.0.rc1/lib/rails/engine.rb:522:in `call'
/opt/rh/rh-ruby22/root/usr/share/gems/gems/puma-3.3.0/lib/puma/configuration.rb:224:in `call'
/opt/rh/rh-ruby22/root/usr/share/gems/gems/puma-3.3.0/lib/puma/server.rb:561:in `handle_request'
/opt/rh/rh-ruby22/root/usr/share/gems/gems/puma-3.3.0/lib/puma/server.rb:406:in `process_client'
/opt/rh/rh-ruby22/root/usr/share/gems/gems/puma-3.3.0/lib/puma/server.rb:271:in `block in run'
/opt/rh/rh-ruby22/root/usr/share/gems/gems/puma-3.3.0/lib/puma/thread_pool.rb:111:in `call'
/opt/rh/rh-ruby22/root/usr/share/gems/gems/puma-3.3.0/lib/puma/thread_pool.rb:111:in `block in spawn_thread'
/opt/rh/cfme-gemset/gems/logging-1.8.2/lib/logging/diagnostic_context.rb:323:in `call'
/opt/rh/cfme-gemset/gems/logging-1.8.2/lib/logging/diagnostic_context.rb:323:in `block in create_with_logging_context'