TUFLOW Message 2079
WARNING 2079 - 3D breakline failed to modify any Zpts. Check elevations, snapping and correct GIS projection.
3D breakline failed to modify any Zpts. For example a zsh line with a "MAX" shape options will not modify any elevations if current cell elevations are higher than in the breakline.
Very short breaklines can also fail to select any cells using the TUFLOW "cross-hair" approach. See image below, click on image below for larger view.
Check elevations, snapping of elevation points to breakline and correct GIS projection.