Loco has "fallen" in the link plan of Indore-Pune-Indore Exp, say for 2 or 3 runs. The reason being: Due to sad incident of derailment near Harda, lots of trains were cancelled / diverted, etc. Due to this, SRC WAP4 may have remained as an idle / extra / available loco at Indore. So, WR Operations Staff put this into service by running Indore-Pune Exp for 2 runs. I will keep watch on this loco (if it comes back to Pune again)!