Hey guys,
I have a drawing that currently has 210 layers. For this drawing I only need about 20 max. I tried to purge the layers that I know have nothing on them but Civil 3D will not allow it. These seem to be National Cad standard layers. All these extra layers just make using the program difficult when I search for a particular layer. How do I purge them?
PS For some reason the program did let me purge 26 (I started with 236 layers) of the layers but that is all...interesting.

As always,
Thanks in advance!