this might be a rare incident....almost every yr CR has specials to PNBE/RJPB.
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Termini at LTT/DR/CSTM are above saturation point....maybe thats why...also spare rakes may not be avbl.
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CR has lots of coaches...
more... that were made in the early 1990`s and they are due for scrapping.....newer coaches may not arrive soon...hence coaches are in shortage