(Example 15. See manual)

echo -no
number_of_space_dimensions 2
end_initia

node 1  0 0
node 2  1 0
node 3  0 1
node 4  1 1
element 1  -quad4 1 2 3 4

geometry_point 1  0.3 0.3 0.2
geometry_point 2  0.7 0.6 0.1
geometry_line 1  0. 0. 1. 0. 1.e-4
geometry_line 2  1. 0. 1. 1. 1.e-4
geometry_line 3  1. 1. 0. 1. 1.e-4
geometry_line 4  0. 1. 0. 0. 1.e-4

control_mesh_refine_globally  1  -h_refinement
control_mesh_refine_globally  2  -h_refinement
control_mesh_refine_globally  3  -h_refinement
control_mesh_refine_globally  4  -h_refinement
control_mesh_split           10  -yes
control_mesh_delete_geometry 20  -geometry_point 1
control_mesh_delete_geometry 30  -geometry_point 2

(The presence of the last node ist checked for)
target_item 0  -node 545  0
target_value 0 0.96875 1.e-5
end_data
