Loading the attached IDF fails to completely render the building and gives the error: "At least three points needed to fit a plane". It appears that one of the walls becomes corrupt and is thought to have 2 vertices (even though it renders properly with 5 vertices) and then the above error occurs when checking if a window is on the same plane as the wall.
Patch: https://sourceforge.net/tracker/?func=detail&aid=2888191&group_id=133018&atid=725737