010513: The input dataset doesn't have a vertical unit.


There is no vertical unit (z-unit) in the input's spatial reference. To perform geodesic analysis, a z-unit is required.


Define a vertical coordinate system with the expected vertical units for your input using the Define Projection tool.

If you use an input that does not have a vertical unit defined, meter is used by default as the z-unit. You can choose a different unit from the parameter drop-down list.