Redmine

The idea of this plugin is really good, but I didn't manage to get it working. I get the following error:

ActionView::TemplateError (No route matches {:action=>"save_elem", :type_name=>"ProcessModel", :parent_id=>nil}) on line #5 of vendor/plugins/redmine_process_frameworks/app/views/admin_process_models/new_elem.html.erb:
2:     &#187;<%=l(:label_new)%><%=link_to @name,:controller=>'admin_process_models',:action => 'index', :tab=> @type_name%></h2>
3: 
4: <div id="issue_descr_fields">    
5:        <% form_for  :type,:url=>{:action=>'save_elem',:type_name=>@type_name,:parent_id=>@parent_id},:method=>"post" do |f| %>     
6:             <div class="box tabular">
7:             
8:             <p><label for="name"><%=l(:field_name)%></label><%= f.text_field :name, :required => true, :size => 60 %></p>

I looked into the controller and I did find a definition for save_elem. I'm really no Ruby programmer so I can't figure it out.

Also I tried reverting the plugin using rake db:migrate:plugin NAME=redmine_process_frameworks VERSION=0 RAILS_ENV=production and I found it does not work as the migrations contain a hell lot of errors (which I already fixed, but have no where to send them to the developer).

I'm using the development branch which I got from here: https://github.com/edavis10/redmine

Any ideas?