Wonder if anyone else has come across this error.
When I started BG2 from BG1 via BGT I got a dialog from Wulfgar that if Drizzt leaves he is off as well. Strange thing is, I was still in the cage at the start of the game. Drizzt joined ok and everything went ok, until I got to Regis who as soon as I entered the area he is being held, he said the same thing and left. Had to cheat to put him back so I could continue the story.
In the process of re-installing everything again through BiG Setup, but anyone had a idea what is causing it, so I don't get the same error again?