I've finally diagnosed the most crippling error in my Mod. I had it in my mod since november last year. It happens only when GDI loads, and only 50% of the time.

anyway, along with this error I've diagnosed other IEs. some of them might seem ridiculous but trust me, I tested these things over and over in my TS to rule out coincidence.

here's what I've discovered so far (note: the unknown* are the errors that happen when loading GDI.. I'll discuss that)

>error on 'gathering intel on involved factions' --- unknown *
>error on 'analyzing combat zone topography' --- unknown *
>error on 'compensating for ambient light values' --- unknown *
>error immediately after loading --- mismatched weapon, warhead on starting unit
>error a few seconds after loading --- :probable: missing SHPs or corrupt TIBSUN.mix
>error during game --- :probable: mismatched weapon, warhead, report on produced unit (either by pc or player), map problems
>error the moment menu opens --- corrupt TIBSUN.mix
>error in-game --- :probable: a produced unit has voxel=(something other than yes or no) in its art.ini entry
>error in-game --- :probable: lots of units with weapons that have very high ROF and long report are firing at the same cell.
>error in-game --- :probable: a unit using a weapon with bad-coded particle system destroyed another unit
>error in-game --- :probable: insufficient memory
>error on 'secondary check of combat zone' --- multiplayer map with houses (with GDI and NOD aligned units on map)
>error on 'deploying forces to combat zone' --- multiplayer map has bad coding of houses and triggers

now, my GDI loading error is caused by the Dropship loading screen. It sounds ridiculous and utterly illogical because its just a .pcx image after all and I can't imagine how it could crash the game (but because I thought so myself, I took a long time finding out that it was the reason). But the error ALWAYS, 100% happens when it is the GDI dropship loading screen that's used by the game. the error NEVER happens when the Titan loading screen is used.

I don't know how to fix that.... nor how it causes a loading error....

I hope this list I compiled will help future modders...