This is the output of an tp2 which checks the area links:
Missing entrance "EXITS" in AR1700 (referenced from worldmap:11 [AR0020]) Missing entrance "EXITNE" in AR1700 (referenced from worldmap:12 [AR1404]) Missing entrance "EXITNE" in AR1700 (referenced from worldmap:13 [AR1304]) Missing entrance "EXITW" in AR0020 (referenced from worldmap:14 [AR2000]) Missing entrance "EXITNE" in AR1700 (referenced from worldmap:14 [AR2000]) Missing entrance "EXITNE" in AR1700 (referenced from worldmap:19 [AR1800])
The BG2 Fixpack adds a new entrance to AR1700, AR1800, AR2500 and AR2600. (CDExit)
Not sure if you are willing to include more BG2 Fixpack compatability code, though.