030291: Cannot create a network dataset using Z coordinates for the elevation model because one or more source feature classes do not have Z coordinates: "<value>".

Description

Z-coordinates cannot be used for the network dataset's elevation model because a source feature class does not have z-coordinates.

Solution

Specify a different elevation model, use different source feature classes for the network, or add a vertical coordinate system for the source feature classes.

Learn more about vertical connectivity in a network dataset