I'm getting an identically flagged crash, but at 'line number 899' - right from the start next to the group of chanting priests in Candlekeep inner grounds ("so sayeth the wise Alondo"). I avoided them and spoke to Gorion and it happens at the start of the Sarevok encounter as well (just after his first two henchmen have appeared but before Sarevok himself or perhaps as he appears - not sure).
I think its probably a consequence of me having absolutely no idea how to install this behemoth properly, just left it to the BWS thing thinking it would know what to do... and it generated a bunch of errors with various messages which I couldn't fully understand. It seemed to be unable to find files for some mods so I downloaded them manually as I think it was trying to suggest and let it carry on, then it couldn't install something. I figured that if it couldn't install a particular mod then whatever - there's enough still there for an Infinity of extended BG fun... or graft since I wanted a tougher game than I played all those years ago

After it took me and my 'puter over 12hrs to get it all done (shocking really but, as I said, I really couldn't make sense of the documentation and what all the different versions and compilations even were and it was painfully slow to run) I'd be a little gutted if I couldn't get out of Candlekeep! However, I would be prepared to clear it all out and start from scratch if I really have to (any tips on how to speed the process up at all?)
Also, is my BG2 folder supposed to look like a heap of junk? There's enough folders and files there for... I don't know what but it seems a little inefficient? The installer has dumped every single setup.exe in there - is this correct behaviour?