It is not able to find 'dot' reported upstream https://github.com/glejeune/Ruby-Graphviz/issues/46 -- പ്രവീണ് അരിമ്പ്രത്തൊടിയില് You have to keep reminding your government that you don't get your rights from them; you give them permission to rule, only so long as they follow the rules: laws and constitution.