Create terrain by text interpolation not work

I created a 2d file where I placed heights using the text tool.
Then I attach this 2d file to 3d model.
When I try to create a terrain model, nothing happens.

I tried exactly as per the instructions:
https://communities.bentley.com/products/road___site_design/w/road_and_site_design__wiki/9881/video-import-text-as-spot-elevations-to-create-a-terrain-model

I am posting my DGN file and asking for help
https://1drv.ms/u/s!AoKLTsHic9oZiSHoczmtQ3funPgH?e=8TW1OH