How to break Civil 3D 2013

In Civil 3D 2013 (with or without hotfix 2.1), use the PLOT command and use the Window option. While being prompted for the window corners, use the middle button mouse wheel to zoom to locate the exact point you want. Civil 3D then enters a loop in which it displays:

Document “drawing name” has a command in progress.
Hit enter to cancel or [Retry]:

At this point, the user can do nothing with the program. Hitting Enter, Esc, R, etc. or doing more all do nothing except cause the message to be redisplayed. Picking a point or further wheel … Full post