assertion fail in infscreeninventory.cpp line number 9909
when i select an item in my inventory the above message appears
then a HARD crash... kicks me out of game... grrrr
help please ..win 7 kick butt puter runnig at 4.3 gh
ty

You can bet your shirt that's down to an installed mod. Please post the contents of your weidu.log here.

// Log of Currently Installed WeiDU Mods
// The top of the file is the 'oldest' mod
// ~TP2_File~ #language_number #component_number // [Subcomponent Name -> ] Component Name [ : Version]
~DDRAWFIX/DDRAWFIX.TP2~ #0 #0 // DDrawFix -> Force DirectDraw Emulation: v1.0

Hickory hi.... no mods and no patches..loaded game from gog 12/12/14. played yrs ago, thought i'd play again.
this ver is v2.5.26498
thanks 4 any help u may give
p.s. still crashing when i select anything in inventory that is in blue highlights ( unknown ) . that means i cant id any good stuff..lol

Ok, then it sounds like you are using an old save game. Is this correct? If so, start a new game and see if you get the same problem. Save games retain lots of data from mods and such, and if something in there is not installed, then it can crash the game. Otherwise, with a clean game, no patches or mods, I can't imagine why this would happen.

Hickory...first.. ty 4 your interest in my problem... i found the cause ...after 5 reinstalls.. i changed the graphic display
from 1280 to 1020..end of crashes.. i have no idea why 1280 does bad things...i'm no guru on soft ware stuff.. i
build puters ..they are just parts..fun is..

Yeah, this is pretty fucked up. It seems like some routines fail if you run the game on higher resolutions than originally intended and it only occurs when I inspect some specific items in my inventory. You can download the widescreen-patch and change the resolution with it, then this bug will not occur (the inventory is rendered in original size).

I recall taking the battery out of my laptop to play with only the power cord attached and, of course, the power blinked off while I was playing BG1, which obviously made me lose my PC for the moment. Right after that I got that stupid "assertion error" message when I tried to reload my most recent save-game. I didn't know what caused it at first but when my power flashed off/on for a second time, a week or two later, I determined the sudden shut-down bugged my save-games. What was really weird was that I could get all the way to where you choose which game to load, and then the error message would pop up. Sometimes, just scrolling through my saved games would do it. I haven't played without my battery in ever since.

I was really peeved, too, as it was my first playthrough and I'd just gotten to Baldur's Gate proper. That had taken me a while, even using some walkthrough help.

Anyway, maybe my experience can help someone else avoid the mistake(s) I made.