Using Sequence 3C-E4 on the configuration shown on the first cube below does nothing. Instead use Sequence 3C-E2 to fix two facelets, the first move (on first cube) makes the setup (second cube), complete the solution as shown.
|  |  | 
| 1 | Make Setup | 
| 2-6 | Sequence 3C-E2 | 
| 7-8 | Make Setup | 
| 9-13 | Sequence 3C-E2 | 
| 14-16 | Make Setup | 
| 17-21 | Sequence 3C-E2 |