set activ object am object anactiv am illeg argument except messag am messag illeg argument except messag anactiv anactiv messag illeg argument except activ messag messag me messag am messag activ messag anactiv me activ illeg argument except set activ messag equal activ activ me interact activ interact illeg argument except set activ interact messag equal interact activ activ doe messag activ activ activ me illeg argument except set activ messag activ origin activ activ predecessor messag me predecessor contain activ me predecessor remov activ list messag list chang arrai list messag collect messag predecessor me predecessor list chang add predecessor list chang add me interact inter me interact messag me inter messag me predecessor contain me list chang add me caus problem make multipl messag refer activ return classifi role activ emen sure chang activ messag amend messag certainli chang bob messag me list chang me set activ activ 