[Mobhack]

DRG EDIT: I have made bold the very important issue of setting in and max armour values and made this a sticky for the next time this "issue" comes up.


The op-fire filter requires you to set min and max armour values - otherwise it has nothing to filer on. This is unlike the "Y" key function which is a range-only filter.

All filtering in the game gets switched off (set to range +1 of the firer IIRC for the plain Y function) when the unit gets fired upon by some enemy, in order to allow it to reply to the enemy unit with reverse opfire if it survived the shot. This is SP 101, and has been since SP1 (Or maybe 2?) - whenever the "Y" key feature arrived anyway.

It also applies in reverse if you manually fire at an enemy unit, so that it is able to fire on it without you having to set filters- otherwise the unit would refuse to fire, resulting in confused end users.

So you may need to reset filtering if those circumstances occur, and you wish the unit to revert to being "choosy" once more when the threat is dealt with.