Cubit 17.02 User Documentation
Spline geometry of the surfaces and curves of an entity can be replaced with geometrically equivalent analytic surfaces and curves. The following command attempts to do this:
Healer Simplify {volume <ids>|body <ids>} [{simplifytol} <value>] [keep]
Use simplifytol to specify a tolerance for the simplification operation. The default tolerance is 1e-6. Note: Even if the spline entity is within this tolerance to the analytic form, simplification still may not be possible.
The keep option will retain the original body and generate a new body containing analytic surfaces.
Execute Filter Curve Geometry_type Spline