you have to remove all invalid entries before you will continue..
and some tips:
if you start object browser in map editor, DO NOT press Cancel, if you dont want to put object, select any, put it somewhere, and delete it..
before saving your map check in object list if there is a BinNt07_LA objects, if yes - remove them all.
you still cant be 100% sure about your map, but when i discovered all that thigs, i never got any problem anymore, and sucessfully created a lot of maps