The error you posted is simply telling you that there are 3d modles that aren\'t, erm, well, closed. I don\'t see why some missing polygons would halt the loading, as I think that is a message most people see.
Were you running it with -relight at the time? If so, there is a fairly good chance that it hasn\'t actualy stalled. When running with -relight, the client can sit for a looooooooooooong (especialy when loading the plaza area) while it does it\'s thing.