When performing a series of surface commands in NX 11.0.1, you will be warned if the output faces intersect themselves.
An alert will appear in that case:
You can ignore the warning and proceed. In that case, the feature will be marked up in part navigator with a warning:
This applies only to self-intersecting faces, not two different faces of the same feature that intersect.
The self-intersection alert has been implemented for following surface commands: