Hi there, This is in master_worker.rb at 266 - it looks to me that there is a bug in reading the lazy_loading property. The line below doesn''t work if lazy_load: true is specified in the yml. lazy_load = CONFIG_FILE[:backgroundrb][:lazy_load].nil? ? true : CONFIG_FILE[:backgroundrb][:lazy_load].nil? should say something like this: lazy_load = CONFIG_FILE[:backgroundrb][:lazy_load] || true Also, there is print statement on the next line that should probably go away. thanks, emil