The ExtractBadSrf command separates surfaces with errors from a polysurface.
Steps
| 1. | When you find a polysurfaces that does not pass the Check command, use the ExtractBadSrf command to extract the bad surfaces from the original polysurface. | 
| 2. | Fix the bad surfaces and use the Join command to reattach them. | 
See also
Rhinoceros 5 © 2010-2015 Robert McNeel & Associates. 17-Sep-2015