Nowdays this is the problem with Zones, As it was in case with BYPL-HSRA-OML sections where Toppur TSS is yet to energize after completing CRS on March 25th 2022. Trains like 12257,16527,16212 and 11021 are running with diesel locos.
Likewise for this train 16339 in DMM-PAK-KPD line.
However 17247 and 12731 this both trains run end to end with Eloco on this route.