Currently this must be done from in-channel.
Previously:
2016-04-07 01:39:42,138 [10] ERROR Default [(null)] - Object reference not set to an instance of an object System.NullReferenceException: Object reference not set to an instance of an object at helpmebot6.Commands.Part.ExecuteCommand () [0x00000] in <filename unknown>:0 at helpmebot6.Commands.GenericCommand.ReallyRunCommand () [0x00000] in <filename unknown>:0