I want to output one of two solids with TinSurfaceExtentions.CreateSolidsAtSurface

TinSurfaceExtentions.CreateSolidsAtSurface outputs two solids, an embankment solid and a cut solid.
Is there a way to output only the embankment solid selected in the image?
This is because Civil3D freezes when the work of outputting two solids is repeated on the same drawing.
I do this repeatedly on the same drawing because I need some case studies for my work.

It isn’t possible to select which solid you want before running the create solids between surfaces method. However what you can try is cropping one of the surfaces at the area that interests you (you can do this through dynamo) to reduce the number of triangles in the surfaces. It may help on the performance level, I think it could be worth the try