Do you mean Nile to Mis?
Try this - You will have to re-save NPZ as NPJ
DFX / Joint Operations NPJ-2-MIS Converter
if you need the Binary - Open the recompiled MIS in the correct MEd.
The MEd you use will need the same objects as the mission or you'll have to delete them or manually replace them with substitutes, then you can export the mission as a playable BMS.