I don't know if this is a possible bug, or was done on purpose, or is just my computer.
The Old Hatolis area is broken down into a number of different sub-areas, which are separated either by doors or portals.
In at least 3 of the areas I tried to call up the map, and this resulted in the game freezing completely. Nothing worked, except for some reason the "J" key - which brings up the list of your quests - even ESC didn't work. I had to bring up the Task Master, cancel the game, and then reload the game from my last save.