How to navigate and use the Load Contours tool set

Hi Prarieboy,

I have also noticed when importing a CAD plan and trying to filter linework out sometimes it does not allow me to select specific lines.
Does anyone know the linetype criteria required to be selected:
* Featureline
* 3d poly
* poly
* arc
* spline
or is it to do with the linetype (continuous, dashed etc...)

I ensured my lines were not block references or grouped. Any help is greatly appreciated