Eureka ! I was having consistent crashes when going from inside to outside in WhiteRun/DragonReach. Having read Wthrman13's post, I realised that I had also added a [MapMenu] section as part of the 3D Map mod installation. Just removed the complete [MapMenu] section from the INI file (and disabled the 3D Map mod) and all works fine again ! No crashes ... able to move in and out of all WhiteRun buildings just fine ! Thanks very much for the tip !! N