Uninitialized class variable @@env in OCI8

Rails
1

Can anyone help me with the uninitialized class variable @@env in OCI8
error raised in my app\views\xxxx index.html.erb file

Thanks in advance

Below is the code and the result of bundle show. I am using Windows 7

Listing comics

<% @comics.each do |comic| %>

<% end %>
Title Issue Publisher
<%= comic.title %> <%= comic.issue %> <%= comic.publisher %> <%= link_to 'Show', comic %> <%= link_to 'Edit', edit_comic_path(comic) %> <%= link_to 'Destroy', comic, :confirm => 'Are you sure?', :method => :delete %>

Gems included by the bundle

  • abstract (1.0.0)
  • actionmailer (3.0.8)
  • actionpack (3.0.8)
  • activemodel (3.0.8)
  • activerecord (3.0.8)
  • activeresource (3.0.8)
  • activesupport (3.0.8)
  • arel (2.0.10)
  • builder (2.1.2)
  • bundler (1.0.15)
  • erubis (2.6.6)
  • i18n (0.5.0)
  • mail (2.2.19)
  • mime-types (1.16)
  • polyglot (0.3.1)
  • rack (1.2.3)
  • rack-mount (0.6.14)
  • rack-test (0.5.7)
  • rails (3.0.8)
  • railties (3.0.8)
  • rake (0.9.2)
  • ruby-oci8 (2.0.6)
  • thor (0.14.6)
  • treetop (1.4.9)
  • tzinfo (0.3.28)