A milking system comprises a plurality of apparatuses (11a-g), wherein eachof the apparatuses comprises a device (12a-g) for performing an action relatedto the operation of the milking system a microprocessor (13a-g) an error messagegenerating system (14a-g) for generating error messages (21) about errors thathave occurred in the apparatus and means (15a-g) for communicating said errormessages to all other ones of the apparatuses. Each of the error messages comprisesinformation, preferably categorized information, regarding the nature (22)and severity (23) and optionally physical location of the error and is interpretableby all other ones of the apparatuses.
