16318 has 2AC coach from JAT to TEN, but cant book JAT-ED 2AC tkt (or seems to any stn from NGP to ED) , but can do booking to KRR next to ED, with little extra fare. The train splitting to slip route to TEN with 2AC & CAPE with 3AC occurs at ED per timetable. When tried to do booking, JAT-ED 2AC shows CLASS DOES NOT EXIST? Can I book to KRR and detrain at ED? Pl. advise