search channel / slug on article exist, if not 404 error
search channel / slug on article exist, if not 404 error

jeanmask/opps,YACOWS/opps,YACOWS/opps,williamroot/opps,YACOWS/opps,williamroot/opps,williamroot/opps,opps/opps,opps/opps,opps/opps,jeanmask/opps,opps/opps,jeanmask/opps,williamroot/opps,YACOWS/opps,jeanmask/opps