I am also getting this error in a complex model.
Any ideas what I should avoid when modeling, so it wont happen again?
Date; 29-Apr-14 18;16;21
An error occured in Joint Push Pull
Error in generation of the geometry
undefined method `smooth?' for nil;NilClass
JointPushPullGeometry.rb; 1107 -- block in geometry_coplanar_edges_overhang
JointPushPullGeometry.rb; 1105 -- each
JointPushPullGeometry.rb; 1105 -- each_with_index
JointPushPullGeometry.rb; 1105 -- geometry_coplanar_edges_overhang
JointPushPullGeometry.rb; 354 -- block in geometry_robot_erase_coplanar_edges
JointPushPullGeometry.rb; 352 -- each
JointPushPullGeometry.rb; 352 -- geometry_robot_erase_coplanar_edges
JointPushPullGeometry.rb; 214 -- robot_call_action
JointPushPullGeometry.rb; 177 -- geometry_robot_exec
JointPushPullGeometry.rb; 160 -- geometry_robot
JointPushPullGeometry.rb; 75 -- block in geometry_execute
Lib6Operation.rb; 317 -- call
Lib6Operation.rb; 317 -- step_geometry
Lib6Operation.rb; 278 -- block in yield?
-e; 1 -- call