I'm having trouble generating a TIN. Repeatedly, I obtain:
ERROR 050035: no features were added to the TIN.
I can't figure out what I'm doing incorrectly. There is only one feature, namely "DEM_points". Those points all have an Object_ID, a point shape, and an elevation number (a short) associated with them. There are 2864 of such points contained within the feature class.
Here are some screenshots of what I tried: