Are you using the same library version as the others?
Is this an old file i.e one that has been started in another version?
If so, do you have the migration library loaded for that version?
Have you tried selecting all the missing wall ends, open their settings box, change one parameter and then change it back? You may have to close out of the settings box and so the change takes effect and then opening the settings box again and changing it back?
You can create a favorite for the wall end in case of future problems.
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"