Alright, this is one hard ass fight. I fought Jonny and his crew for 20 minutes easily...So, I made sure to fell all of his minions before killing Irenicus himself. Once I waste Irenicus, nothing happens. I get the experience, and blah. I can't save or rest because it says there are monsters still about...I'll probably just uninstall the improved Irenicus feature, but do youse guys have any ideas one what's wrong?

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where did you fight him this time? was it near the end of the game at the tree of life or whatever, or inside the asylum, or somewhere else? as for why it says can't rest monsters are about... have any of your characters had spells cast on them that makes them evil? if you can't control one of your characters, they are victims of something, and whatever it is might cause the monsters warning. if you summoned creatures and didn't cast a protection against evil spell the creatures you summoned might be trying to hurt you even if you're far away, go back and kill them if this is the case. these may not be the problems... i once had that monster warning and it drove me nuts, and then it just went away but i'm not sure which of the things i did made it dissapear.

by the way, it could be the patch, but i'm not sure cause i didn't put any patches in my game.

It's the very last battle with him...and nope, I didn't have any summons, and my crew were all under mmy control.

then i'd say it's a bug, or something wrong with the patch. wander around a bit and continue the game until hopefully it will let you save. if you do this you may get around the bug as i did. otherwise, delete the patch, and pray!

hope it all works out!

now that i think about it, i haven't been much help have i? i'm sorry, i don't know much about computers and whatnot. before you delete anything, get someone elses opinion. someone smarter than i am!

Have you played through the whole game?

no, i am in the middle of the underdark, but you don't need to beat the game yourself to help your problem. it's a bug that's quite common.

<font color="lightblue">Get the official patch from Bioware.
Even if you installed it before modding the game, reinstall it now; some of its features are overruled by mods. </font>

This is a very drastic solution which is guaranteed to break virtually every mod installed. If you're going to reinstall the Bioware patch, you're basically giving up on everything in the game already.

Trau, have you tried searching the area for a missing enemy, particularly with True Sight running in case they went invisible?

If not, then yes, just uninstall the Imp. Irenicus component.

The very last battle is the one that takes place in hell. Did you move around the room because when irenicus turns into the Slayer he teleports around the center of the room.