I'm trying to start the openhab dashing project, but I'm still having the same error. When I try the dashing with the sample project everything starts perfect, but not with the OpenHab project.
user#server:~/dashboard$ dashing start
/usr/local/lib/ruby/gems/2.0.0/gems/backports-3.6.7/lib/backports/std_lib.rb:9:in `require': cannot load such file -- data_mapper (LoadError)
from /usr/local/lib/ruby/gems/2.0.0/gems/backports-3.6.7/lib/backports/std_lib.rb:9:in `require_with_backports'
from /home/jopo/dashboard/lib/settings.rb:1:in `<top (required)>'
from /usr/local/lib/ruby/gems/2.0.0/gems/backports-3.6.7/lib/backports/std_lib.rb:9:in `require'
from /usr/local/lib/ruby/gems/2.0.0/gems/backports-3.6.7/lib/backports/std_lib.rb:9:in `require_with_backports'
from /usr/local/lib/ruby/gems/2.0.0/gems/dashing-1.3.4/lib/dashing/app.rb:157:in `block in require_glob'
from /usr/local/lib/ruby/gems/2.0.0/gems/dashing-1.3.4/lib/dashing/app.rb:156:in `each'
from /usr/local/lib/ruby/gems/2.0.0/gems/dashing-1.3.4/lib/dashing/app.rb:156:in `require_glob'
from /usr/local/lib/ruby/gems/2.0.0/gems/dashing-1.3.4/lib/dashing/app.rb:166:in `<top (required)>'
from /usr/local/lib/ruby/gems/2.0.0/gems/dashing-1.3.4/lib/dashing.rb:3:in `require'
from /usr/local/lib/ruby/gems/2.0.0/gems/dashing-1.3.4/lib/dashing.rb:3:in `<top (required)>'
from config.ru:1:in `require'
from config.ru:1:in `block in <main>'
from /usr/local/lib/ruby/gems/2.0.0/gems/rack-1.5.5/lib/rack/builder.rb:55:in `instance_eval'
from /usr/local/lib/ruby/gems/2.0.0/gems/rack-1.5.5/lib/rack/builder.rb:55:in `initialize'
from config.ru:1:in `new'
from config.ru:1:in `<main>'
from /usr/local/lib/ruby/gems/2.0.0/gems/thin-1.6.4/lib/rack/adapter/loader.rb:33:in `eval'
from /usr/local/lib/ruby/gems/2.0.0/gems/thin-1.6.4/lib/rack/adapter/loader.rb:33:in `load'
from /usr/local/lib/ruby/gems/2.0.0/gems/thin-1.6.4/lib/thin/controllers/controller.rb:182:in `load_rackup_config'
from /usr/local/lib/ruby/gems/2.0.0/gems/thin-1.6.4/lib/thin/controllers/controller.rb:72:in `start'
from /usr/local/lib/ruby/gems/2.0.0/gems/thin-1.6.4/lib/thin/runner.rb:200:in `run_command'
from /usr/local/lib/ruby/gems/2.0.0/gems/thin-1.6.4/lib/thin/runner.rb:156:in `run!'
from /usr/local/lib/ruby/gems/2.0.0/gems/thin-1.6.4/bin/thin:6:in `<top (required)>'
from /usr/local/bin/thin:23:in `load'
from /usr/local/bin/thin:23:in `<main>'
Where do I need to search for the solution?
It is missing a ruby gem. Try to install it with
sudo gem install datamapper
Related
I know this type of question is already asked.
I use s3 gem to upload my files in s3 bucket. But after s3 gem installation, when I start rails server it shows this error:
/var/lib/gems/1.9.1/gems/aws-s3-0.6.3/lib/aws/s3/extensions.rb:223:in `class_eval': /var/lib/gems/1.9.1/gems/aws-s3-0.6.3/lib/aws/s3/extensions.rb:223: `##{' is not allowed as a class variable name (SyntaxError)
/var/lib/gems/1.9.1/gems/aws-s3-0.6.3/lib/aws/s3/extensions.rb:223: syntax error, unexpected $end
unless defined? ##{:instance_writer=>true}
^
from /var/lib/gems/1.9.1/gems/aws-s3-0.6.3/lib/aws/s3/extensions.rb:223:in `block in cattr_reader'
from /var/lib/gems/1.9.1/gems/aws-s3-0.6.3/lib/aws/s3/extensions.rb:222:in `each'
from /var/lib/gems/1.9.1/gems/aws-s3-0.6.3/lib/aws/s3/extensions.rb:222:in `cattr_reader'
from /var/lib/gems/1.9.1/gems/aws-s3-0.6.3/lib/aws/s3/extensions.rb:258:in `cattr_accessor'
from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/cache.rb:155:in `<class:Store>'
from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/cache.rb:154:in `<module:Cache>'
from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/cache.rb:14:in `<module:ActiveSupport>'
from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/cache.rb:12:in `<top (required)>'
from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `require'
from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `block in require'
from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:232:in `load_dependency'
from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `require'
from /var/lib/gems/1.9.1/gems/jbuilder-2.2.5/lib/jbuilder/jbuilder_template.rb:3:in `<top (required)>'
from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `require'
from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `block in require'
from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:232:in `load_dependency'
from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `require'
from /var/lib/gems/1.9.1/gems/jbuilder-2.2.5/lib/jbuilder/railtie.rb:2:in `<top (required)>'
from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `require'
from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `block in require'
from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:232:in `load_dependency'
from /var/lib/gems/1.9.1/gems/activesupport-4.1.5/lib/active_support/dependencies.rb:247:in `require'
from /var/lib/gems/1.9.1/gems/jbuilder-2.2.5/lib/jbuilder.rb:317:in `<top (required)>'
from /var/lib/gems/1.9.1/gems/bundler-1.6.2/lib/bundler/runtime.rb:76:in `require'
from /var/lib/gems/1.9.1/gems/bundler-1.6.2/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
from /var/lib/gems/1.9.1/gems/bundler-1.6.2/lib/bundler/runtime.rb:72:in `each'
from /var/lib/gems/1.9.1/gems/bundler-1.6.2/lib/bundler/runtime.rb:72:in `block in require'
from /var/lib/gems/1.9.1/gems/bundler-1.6.2/lib/bundler/runtime.rb:61:in `each'
from /var/lib/gems/1.9.1/gems/bundler-1.6.2/lib/bundler/runtime.rb:61:in `require'
from /var/lib/gems/1.9.1/gems/bundler-1.6.2/lib/bundler.rb:132:in `require'
from /home/rick/rick/Projects/practice/sharebox/config/application.rb:7:in `<top (required)>'
from /var/lib/gems/1.9.1/gems/railties-4.1.5/lib/rails/commands/commands_tasks.rb:79:in `require'
from /var/lib/gems/1.9.1/gems/railties-4.1.5/lib/rails/commands/commands_tasks.rb:79:in `block in server'
from /var/lib/gems/1.9.1/gems/railties-4.1.5/lib/rails/commands/commands_tasks.rb:76:in `tap'
from /var/lib/gems/1.9.1/gems/railties-4.1.5/lib/rails/commands/commands_tasks.rb:76:in `server'
from /var/lib/gems/1.9.1/gems/railties-4.1.5/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
from /var/lib/gems/1.9.1/gems/railties-4.1.5/lib/rails/commands.rb:17:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
Does anyone know, how to solve this error? Should I try another gem?
Yeah i just ran into this issue and resolved. It is because AWS updated their gem to 2.0. If you update the gem to 2.0 different configuration is required according to this article they posted.
If you want to using the version you had before, just change the Gemfile like below:
Gemfile
gem 'aws-sdk', '< 2.0'
We had the same issue this morning. We already had this aws-sdk gem installed but it was updated to version 2 yesterday. It seems that version 2 doesn't fix this anymore so I advice to use last version 1 : 1.61.0
I have some problem when I trying to deploy Sinatra and sidekiq with capistrano.
In mygem file :
gem 'capistrano-sidekiq' , github: 'seuros/capistrano-sidekiq'
Capfile:
require 'capistrano/sidekiq'
Gemfile.lock
capistrano-sidekiq (0.3.3)
sidekiq (3.2.0)
Error when deployed:
**Don't know how to build task 'restart'**
/home/ubuntu/.rvm/gems/ruby-2.1.2/gems/capistrano-3.0.1/lib/capistrano/dsl/task_enhancements.rb:10:in `after'
/home/ubuntu/.rvm/gems/ruby-2.1.2/gems/capistrano-sidekiq-0.3.3/lib/capistrano/tasks/sidekiq.cap:22:in `block in <top (required)>'
/home/ubuntu/.rvm/gems/ruby-2.1.2/gems/capistrano-sidekiq-0.3.3/lib/capistrano/tasks/sidekiq.cap:18:in `<top (required)>'
/home/ubuntu/.rvm/gems/ruby-2.1.2/gems/capistrano-sidekiq-0.3.3/lib/capistrano/sidekiq.rb:2:in `load'
/home/ubuntu/.rvm/gems/ruby-2.1.2/gems/capistrano-sidekiq-0.3.3/lib/capistrano/sidekiq.rb:2:in `<top (required)>'
/home/ubuntu/projects/feed_bidder/feed_bidder_offline/Capfile:6:in `require'
/home/ubuntu/projects/feed_bidder/feed_bidder_offline/Capfile:6:in `<top (required)>'
/home/ubuntu/.rvm/gems/ruby-2.1.2/gems/capistrano-3.0.1/lib/capistrano/application.rb:22:in `load_rakefile'
/home/ubuntu/.rvm/gems/ruby-2.1.2/gems/capistrano-3.0.1/lib/capistrano/application.rb:12:in `run'
/home/ubuntu/.rvm/gems/ruby-2.1.2/gems/capistrano-3.0.1/bin/cap:3:in `<top (required)>'
/home/ubuntu/.rvm/gems/ruby-2.1.2/bin/cap:23:in `load'
/home/ubuntu/.rvm/gems/ruby-2.1.2/bin/cap:23:in `<main>'
/home/ubuntu/.rvm/gems/ruby-2.1.2/bin/ruby_executable_hooks:15:in `eval'
/home/ubuntu/.rvm/gems/ruby-2.1.2/bin/ruby_executable_hooks:15:in `<main>'
Also when I try to deploy via cap production sidekiq:start -T
I'd like to thank you in advance for helping me out with this.
I am going mad here trying to figure out what is wrong with phusion passenger or my rails app.
I have done a lot of googling as well as read everything on https://github.com/phusion/passenger/wiki/Debugging-application-startup-problems but i still can not seem to figure out what the problem is.
I have included where i think the problem lies but the full error can be accessed at www.malikhandaan.com.
Thank you so much for helping, in advance.
(I am newbie at rails, this is my first app deploy with nginx)
-- Ruby level backtrace information ----------------------------------------
/usr/share/passenger/helper-scripts/rack-preloader.rb:28:in `<main>'
/usr/share/passenger/helper-scripts/rack-preloader.rb:29:in `<module:PhusionPassenger>'
/usr/share/passenger/helper-scripts/rack-preloader.rb:153:in `<module:App>'
/usr/share/passenger/helper-scripts/rack-preloader.rb:108:in `preload_app'
/usr/share/passenger/helper-scripts/rack-preloader.rb:108:in `eval' config.ru:1:in
`<main>' config.ru:1:in `new' /home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/rack-
1.5.2/lib/rack/builder.rb:55:in `initialize' /home/ubuntu/.rvm/gems/ruby-2.0.0-
p353/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval' config.ru:3:in `block in
<main>' config.ru:3:in `require'
/usr/share/nginx/www/malikhandaan/config/environment.rb:2:in `<top (required)>'
/usr/share/nginx/www/malikhandaan/config/environment.rb:2:in `require'
/usr/share/nginx/www/malikhandaan/config/application.rb:3:in `<top (required)>'
/usr/share/nginx/www/malikhandaan/config/application.rb:3:in `require'
/home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/railties-4.0.2/lib/rails/all.rb:1:in `<top
(required)>' /home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/railties-
4.0.2/lib/rails/all.rb:1:in `require' /home/ubuntu/.rvm/gems/ruby-2.0.0-
p353/gems/railties-4.0.2/lib/rails.rb:9:in `<top (required)>'
/home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/railties-4.0.2/lib/rails.rb:9:in `require'
/home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/railties-4.0.2/lib/rails/application.rb:4:in
`<top (required)>' /home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/railties-
4.0.2/lib/rails/application.rb:4:in `require' /home/ubuntu/.rvm/gems/ruby-2.0.0-
p353/gems/railties-4.0.2/lib/rails/engine.rb:1:in `<top (required)>'
/home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/railties-4.0.2/lib/rails/engine.rb:1:in
`require' /home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/railties-
4.0.2/lib/rails/railtie.rb:2:in `<top (required)>' /home/ubuntu/.rvm/gems/ruby-2.0.0-
p353/gems/railties-4.0.2/lib/rails/railtie.rb:2:in `require'
/home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/railties-
4.0.2/lib/rails/configuration.rb:3:in `<top (required)>' /home/ubuntu/.rvm/gems/ruby-
2.0.0-p353/gems/railties-4.0.2/lib/rails/configuration.rb:3:in `require'
/home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/activesupport-
4.0.2/lib/active_support/core_ext/object.rb:11:in `<top (required)>'
/home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/activesupport-
4.0.2/lib/active_support/core_ext/object.rb:11:in `require' /home/ubuntu/.rvm/gems/ruby-
2.0.0-p353/gems/activesupport-4.0.2/lib/active_support/core_ext/object/to_json.rb:3:in
`<top (required)>' /home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/activesupport-
4.0.2/lib/active_support/core_ext/object/to_json.rb:3:in `require'
/home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/json-1.8.1/lib/json.rb:54:in `<top
(required)>' /home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/json-1.8.1/lib/json.rb:58:in
`<module:JSON>' /home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/json-1.8.1/lib/json.rb:58:in
`require' /home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/json-1.8.1/lib/json/ext.rb:9:in
`<top (required)>' /home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/json-
1.8.1/lib/json/ext.rb:12:in `<module:JSON>' /home/ubuntu/.rvm/gems/ruby-2.0.0-
p353/gems/json-1.8.1/lib/json/ext.rb:17:in `<module:Ext>' /home/ubuntu/.rvm/gems/ruby-
2.0.0-p353/gems/json-1.8.1/lib/json/common.rb:67:in `generator='
/home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/json-1.8.1/lib/json/common.rb:67:in `new'
/home/ubuntu/.rvm/gems/ruby-2.0.0-p353/gems/json-1.8.1/lib/json/common.rb:67:in
`initialize'
[NOTE] You may have encountered a bug in the Ruby interpreter or extension libraries.
Bug reports are welcome. For details: http://www.ruby-lang.org/bugreport.html
-----------------------------------------------------------------------
After much research and plugin all night at this i found that ruby-2.0.0 seems to have this error as i downgraded to ruby-1.9.3 the problem was resolved.....i moved from one problem to another...at least i am past this one. :)
Hope this helps any newbie to rails.
Using Ruby 2.0 x64 on Windows. Installed sqlite3 gem by downloading the sqlite3 autoconf sources and compiling. Then I did a gem install sqlite3 --platform=ruby .... However, now when I run rails server, I get the following error. Where is this sqlite3_native.rb? I can't find it anywhere.
C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/sqlite3-1.3.7/lib/sqlite3.rb:6:in `require': cannot load such file -- sqlite3/sqlite3_native (LoadError)
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/sqlite3-1.3.7/lib/sqlite3.rb:6:in `rescue in <top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/sqlite3-1.3.7/lib/sqlite3.rb:2:in `<top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/lib/bundler/runtime.rb:72:in `block (2 levels) in require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `each'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/lib/bundler/runtime.rb:70:in `block in require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `each'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/lib/bundler/runtime.rb:59:in `require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/bundler-1.3.5/lib/bundler.rb:132:in `require'
from C:/Users/me/my_project/config/application.rb:7:in `<top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-4.0.0.rc1/lib/rails/commands.rb:78:in `require'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-4.0.0.rc1/lib/rails/commands.rb:78:in `block in <top (required)>'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-4.0.0.rc1/lib/rails/commands.rb:75:in `tap'
from C:/Ruby200-x64/lib/ruby/gems/2.0.0/gems/railties-4.0.0.rc1/lib/rails/commands.rb:75:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
Here is a tutorial for installing SQLite3 with Ruby 2.0 on Windows.
It is rather a complicated process. Follow the tutorial and see if it works after that.
I have a rails 3.0.20 app running with rvm on ruby 1.9.3p327. My Gemfile reads:
gem 'image_science', :git => 'git://github.com/asynchrony/image_science.git'
and Gemfile.lock has its version as:
remote: git://github.com/asynchrony/image_science.git
revision: dc36ddaadc46aecdef907de3c41a9d14d28ba8d8
specs:
image_science (1.3.2.1.Asynchrony)
I cannot seem to start my app without removing image_science, since I keep getting this error:
/home/umar/gems/ruby/1.9.1/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:242:in `block in require': iconv will be deprecated in the future, use String#encode instead.
rake aborted!
/home/umar/gems/ruby/1.9.1/bundler/gems/image_science-dc36ddaadc46/lib/image_science/extension.so: undefined symbol: _ZTVN10__cxxabiv120__si_class_type_infoE - /home/umar/gems/ruby/1.9.1/bundler/gems/image_science-dc36ddaadc46/lib/image_science/extension.so
/home/umar/gems/ruby/1.9.1/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:242:in `require'
/home/umar/gems/ruby/1.9.1/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:242:in `block in require'
/home/umar/gems/ruby/1.9.1/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:225:in `block in load_dependency'
/home/umar/gems/ruby/1.9.1/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:597:in `new_constants_in'
/home/umar/gems/ruby/1.9.1/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:225:in `load_dependency'
/home/umar/gems/ruby/1.9.1/gems/activesupport-3.0.20/lib/active_support/dependencies.rb:242:in `require'
/home/umar/gems/ruby/1.9.1/bundler/gems/image_science-dc36ddaadc46/lib/image_science.rb:3:in `<top (required)>'
/home/umar/.rvm/gems/ruby-1.9.3-p327#a_proj/gems/bundler-1.3.4/lib/bundler/runtime.rb:72:in `require'
/home/umar/.rvm/gems/ruby-1.9.3-p327#a_proj/gems/bundler-1.3.4/lib/bundler/runtime.rb:72:in `block (2 levels) in require'
/home/umar/.rvm/gems/ruby-1.9.3-p327#a_proj/gems/bundler-1.3.4/lib/bundler/runtime.rb:70:in `each'
/home/umar/.rvm/gems/ruby-1.9.3-p327#a_proj/gems/bundler-1.3.4/lib/bundler/runtime.rb:70:in `block in require'
/home/umar/.rvm/gems/ruby-1.9.3-p327#a_proj/gems/bundler-1.3.4/lib/bundler/runtime.rb:59:in `each'
/home/umar/.rvm/gems/ruby-1.9.3-p327#a_proj/gems/bundler-1.3.4/lib/bundler/runtime.rb:59:in `require'
/home/umar/.rvm/gems/ruby-1.9.3-p327#a_proj/gems/bundler-1.3.4/lib/bundler.rb:132:in `require'
/home/umar/myprojects/a_proj/config/application.rb:9:in `<top (required)>'
/home/umar/myprojects/a_proj/Rakefile:4:in `require'
/home/umar/myprojects/a_proj/Rakefile:4:in `<top (required)>'
/home/umar/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/rake_module.rb:25:in `load'
/home/umar/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/rake_module.rb:25:in `load_rakefile'
/home/umar/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/application.rb:495:in `raw_load_rakefile'
/home/umar/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/application.rb:78:in `block in load_rakefile'
/home/umar/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/application.rb:129:in `standard_exception_handling'
/home/umar/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/application.rb:77:in `load_rakefile'
/home/umar/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/application.rb:61:in `block in run'
/home/umar/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/application.rb:129:in `standard_exception_handling'
/home/umar/gems/ruby/1.9.1/gems/rake-0.9.2/lib/rake/application.rb:59:in `run'
/home/umar/gems/ruby/1.9.1/gems/rake-0.9.2/bin/rake:32:in `<top (required)>'
/home/umar/gems/ruby/1.9.1/bin/rake:19:in `load'
/home/umar/gems/ruby/1.9.1/bin/rake:19:in `<main>'
How can I fix this error.
You may need to install the required libraries (FreeImage and RubyInline) to make ImageScience work. (ImageScience RDoc)
By the way, I assume that you don't use mini_magick or rmagick because you don't have access to an imagemagick or graphicsmagick installation.
Perhaps you should try to use one of these two, because ImageScience has not been updated for a while.
Hope this helps.