NX Edge Blend in valley cannot be created

An Edge Blend in a valley cannot be created although the boundary conditions are all fine.

Run the Edge Blend Function and Select an Edge ( Selection-Intent is Tangent Curves)

May you find an ERROR: 
An Edge Blend in a valley cannot be created although the boundary conditions are all IO.

 

Solution

Need to check the radius blend, may largest radius blend that can roll in this space is a small radius that fit.

Hardware/Software Configuration

Platform: all
OS: n/a
OS Version: n/a
Product: NX
Application: DESIGN
Version: V12.0.2
Function: FEATURE_MODEL

Ref: 002-8014611