@Azaghal
You're welcome. Enjoy Your game. Go ahead and open a new thread for Your saving problem.
At least I got an install sufficiently close to Yours at hand to find this bug. Perhaps it will work for another bug too.
With respect to backup: During an install there may be many different mods that want to change the same file
like for example that file spwi705.spl. Since the mods typically don't want to change the same aspects of that file
there is no problem in allowing all mods to access the file. But of course in a sequential manner and not all mods at the same time.
So every mod gets his turn (may be 2 or three times) to change something. And before this happens the mod (better said WeiDU)
makes a backup of the file the mod is going to change. (This is one reason why we are talking about 20 gigabytes at a BWP install.)
So if You don't use the "cleanup.bat" You have (better said with WeiDU's help one can have) the complete information on how
the install was before mod No 26 and how the install was after mod 26 i.e. before mod 27, and befor mod 28 and so on. You have the install CV.
Only that way a reasonable debugging is possible.
@The Imp
Sorry that I didn't mention it, but of course I checked that backup as the last one working.
In fact the ability of SPWI705.spl has 2 effects: cast spell 705B and cast 705C.
And the ability of SPWI705B.spl looks fishy with it's last effect number 14:
Effect Type: AC bonus (0),Target: None (0),Power: 0,AC value: 0,Bonus to: ( All weapons ),
Deleting this effect in SPWI705B we achieve a working spell SPWI705.spl as well.