Extrude - General Failure The selected face does not produce a valid extrude. This error message appears if the selected face is planar but FeatureWorks cannot create a valid extrude. Examples In these cases, no opposite face is available: Parent topicBoss and Cut Extrudes Extrude - Non-Planar Face Extrude - Non-Parallel Faces Extrude - Non-Coplanar Faces Extrude - Nesting Faces Extrude - Self-Intersecting Sketch Extrude - Internal Loops Extrude - Invalid Edge