I recently ran the Create Contours and Create Spot Heights tools in ArcMap 10.6, but was surprised to see that no spot heights were created in a rural area.
After testing forth and back I ran the same tools on ArcMap 10.4, with the same data and setup.
In ArcMap 10.4 909 spots and 1096 contours were created, while in 10.6 0 spots an 11 contours were created.
I have attached screenshots of the setup and results of the runs in 10.4 and 10.6. All the same extensions were checked out; 3D Analyst, Defense Mapping, Production Mapping and Spatial Analyst.
Are other people/companies experiencing the same thing (bug?), or has it something to do with other settings?