Harshvardhan
Ansys Employee

Hi,
This problem generally occurs when the radius of the sphere of influence as well as the element size inside the sphere is very small as commpared to the element size outside of the sphere of influence, as this results in inability to generate transitioning mesh from fine element to coarse element.

Try increasing the radius of the sphere of influence and the element size inside the sphere.

Regards,
Harshvardhan