undefined method firstname for nil:NilClass on line #171 new.html.erb

[possebon]

Bruno,

Not sure if here is the right place to report an issue or try to get some help. I'm facing this error message when I'm importing an XML project file.

Processing LoaderController#create (for 10.254.55.189 at 2011-02-21 20:30:57) [POST]
Parameters: {"project_id"=>"59", "action"=>"create", "authenticity_token"=>"QvFU2tvxE7HYe952zy5eq/J9cMkNf2kCaG7duqQZPyU=", "controller"=>"loader", "import"=>{"analyse"=>"Analyse", "xmlfile"=>#File:/tmp/RackMultipart25662-0}}
Rendering template within layouts/base
Rendering loader/new

ActionView::TemplateError (undefined method `firstname' for nil:NilClass) on line #171 of vendor/plugins/redmine_loader/app/views/loader/new.html.erb:
168: <%= text_field_tag( "import[tasks][#{ index }][percentcomplete]", h( task.percentcomplete ), { :size => 3 } ) %>
169:
170:
171: <%= loaderhelp_user_selector( "import[tasks][#{ index }][assigned_to]", @project ) %>
172:
173:
174: <%= hidden_field_tag( "import[tasks][#{ index }][predecessors]", h( task.predecessors.join(', ') ) ) %>

vendor/plugins/redmine_loader/app/helpers/loader_helper.rb:110:in `loaderhelp_user_selector'
vendor/plugins/redmine_loader/app/helpers/loader_helper.rb:110:in `sort'
vendor/plugins/redmine_loader/app/helpers/loader_helper.rb:110:in `loaderhelp_user_selector'
vendor/plugins/redmine_loader/app/views/loader/new.html.erb:171
vendor/plugins/redmine_loader/app/views/loader/new.html.erb:142:in `each'
vendor/plugins/redmine_loader/app/views/loader/new.html.erb:142
vendor/plugins/redmine_loader/app/views/loader/new.html.erb:63
vendor/plugins/redmine_loader/app/controllers/loader_controller.rb:94:in `create'
/usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
/usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
/usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
/usr/lib/ruby/1.8/webrick/server.rb:95:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:92:in `each'
/usr/lib/ruby/1.8/webrick/server.rb:92:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:23:in `start'
/usr/lib/ruby/1.8/webrick/server.rb:82:in `start'

Rendering /opt/redmine/public/500.html (500 Internal Server Error)
[2011-02-21 20:36:12] INFO going to shutdown ...

Any clue on this?

Thanks in advance and best regards

Fernando Possebon