Product Contour

Hello, 

I am having a trouble to produce contour using TerraModeler. In the last produce contour dialog cannot save. The step that I use:

Setting contour keypoint in TerraScan > setting for display contour > setting in label peaks and pits > for TerraModeler > Surface > Utility > Produce Contour.

After produce contour step the surface missing on the terramodeler window and contour not show.

If you have any solution can share with me. 

Thanks you, 

Fazirah