Errors while running spree_importer:install command

[aditya-kapoor]

bundle exec rails g spree_importer:install
      append  db/seeds.rb
      append  app/assets/javascripts/store/all.js
/Users/aditya/.rvm/gems/ruby-2.2.1/gems/thor-0.19.1/lib/thor/actions/inject_into_file.rb:98:in `binread': No such file or directory @ rb_sysopen - /Users/aditya/Practice/sunray/dlr/app/assets/javascripts/store/all.js (Errno::ENOENT)
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/thor-0.19.1/lib/thor/actions/inject_into_file.rb:98:in `replace!'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/thor-0.19.1/lib/thor/actions/inject_into_file.rb:59:in `invoke!'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/thor-0.19.1/lib/thor/actions.rb:94:in `action'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/thor-0.19.1/lib/thor/actions/inject_into_file.rb:30:in `insert_into_file'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/thor-0.19.1/lib/thor/actions/file_manipulation.rb:180:in `append_to_file'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/bundler/gems/spree_importer-5c7c8af2d4c7/lib/generators/spree_importer/install/install_generator.rb:13:in `add_javascripts'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/thor-0.19.1/lib/thor/command.rb:27:in `run'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/thor-0.19.1/lib/thor/invocation.rb:126:in `invoke_command'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `block in invoke_all'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `each'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `map'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/thor-0.19.1/lib/thor/invocation.rb:133:in `invoke_all'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/thor-0.19.1/lib/thor/group.rb:232:in `dispatch'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/thor-0.19.1/lib/thor/base.rb:440:in `start'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/railties-4.2.1/lib/rails/generators.rb:157:in `invoke'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/railties-4.2.1/lib/rails/commands/generate.rb:13:in `<top (required)>'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/polyglot-0.3.5/lib/polyglot.rb:65:in `require'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/polyglot-0.3.5/lib/polyglot.rb:65:in `require'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.1/lib/active_support/dependencies.rb:274:in `block in require'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.1/lib/active_support/dependencies.rb:240:in `load_dependency'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.1/lib/active_support/dependencies.rb:274:in `require'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/railties-4.2.1/lib/rails/commands/commands_tasks.rb:123:in `require_command!'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/railties-4.2.1/lib/rails/commands/commands_tasks.rb:130:in `generate_or_destroy'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/railties-4.2.1/lib/rails/commands/commands_tasks.rb:50:in `generate'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/railties-4.2.1/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
    from /Users/aditya/.rvm/gems/ruby-2.2.1/gems/railties-4.2.1/lib/rails/commands.rb:17:in `<top (required)>'
    from bin/rails:8:in `require'
    from bin/rails:8:in `<main>