No idea, here is the trace.
** Invoke test:units (first_time)
** Invoke db:test:prepare (first_time)
** Invoke db:abort_if_pending_migrations (first_time)
** Invoke environment (first_time)
** Execute environment
** Execute db:bort_if_pending_migrtions
** Execute db:test:prepre
** Invoke db:test:lod (first_time)
** Invoke db:test:purge (first_time)
** Invoke environment
** Execute db:test:purge
rake aborted!
You have a nil object when you didn’t expect it!
You might have expected an instance of ActiveRecord::Base.
The error occurred while evaluating nil.
F:/BACKUP/Backup/Web_apps_svn_working/writersonly/R2/vendor/rails/railties/lib/tasks/databases.rake:360
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `execute’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `each’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `execute’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in `invoke_with_call_chain’
F:/BACKUP/Backup/ruby/lib/ruby/1.8/monitor.rb:242:in `synchronize’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:607:in `invoke_prerequisites’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `each’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:in `invoke_with_call_chain’
F:/BACKUP/Backup/ruby/lib/ruby/1.8/monitor.rb:242:in `synchronize’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:in `invoke’
F:/BACKUP/Backup/Web_apps_svn_working/writersonly/R2/vendor/rails/railties/lib/tasks/databases.rake:391
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `call’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in `execute’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `each’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in `execute’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in `invoke_with_call_chain’
F:/BACKUP/Backup/ruby/lib/ruby/1.8/monitor.rb:242:in `synchronize’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:607:in `invoke_prerequisites’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `each’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:604:in `invoke_prerequisites’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:596:in `invoke_with_call_chain’
F:/BACKUP/Backup/ruby/lib/ruby/1.8/monitor.rb:242:in `synchronize’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in `invoke_with_call_chain’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:in `invoke’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in `invoke_task’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `each’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in `top_level’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:in `top_level’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in `run’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in `standard_exception_handling’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in `run’
F:/BACKUP/Backup/ruby/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31
F:/BACKUP/Backup/ruby/bin/rake:19:in `load’
F:/BACKUP/Backup/ruby/bin/rake:19