CivilCAD creates its own layers automatically. Do not delete them.

This specific version is known for crashing less than heavier, newer versions. Key Features of CivilCAD

AutoCAD 2013 was a milestone release for Autodesk. Combining it with a 64-bit operating system and CivilCAD offers specific advantages:

Use the PURGE and AUDIT commands in AutoCAD regularly to keep files lightweight.