# UNCAUGHT EXCEPTION  ~> 'NoMethodError' -
# undefined method `mac' for #<Address:0x7f88d8f6eb50 @id=nil>
# ././lib/deltacloud/drivers/condor/ip_agents/default.rb:54:in `find_free_mac'
././lib/deltacloud/drivers/condor/ip_agents/default.rb:53:in `each'
././lib/deltacloud/drivers/condor/ip_agents/default.rb:53:in `find_free_mac'
././lib/deltacloud/drivers/condor/condor_client.rb:55:in `initialize'
././lib/deltacloud/drivers/condor/ip_agents/default.rb:49:in `new'
././lib/deltacloud/drivers/condor/ip_agents/default.rb:49:in `find_free_mac'
././lib/deltacloud/drivers/condor/condor_client.rb:131:in `launch_instance'
././lib/deltacloud/drivers/condor/condor_driver.rb:151:in `create_instance'
././lib/deltacloud/drivers/condor/condor_driver.rb:207:in `new_client'
././lib/deltacloud/base_driver/exceptions.rb:118:in `call'
././lib/deltacloud/base_driver/exceptions.rb:118:in `safely'
././lib/deltacloud/drivers/condor/condor_driver.rb:206:in `new_client'
././lib/deltacloud/drivers/condor/condor_driver.rb:144:in `create_instance'
././server.rb:413
././lib/sinatra/rabbit.rb:113:in `instance_eval'
././lib/sinatra/rabbit.rb:113:in `POST /api/instances'