HI, is a follow-up to my previous comment.

I would greatly appreciate it if someone would open it in AutoCAD to see if it requires the C3D Enabler? I have attached the '2023 Civil 3D with Drafting and Annotation workspace' file. I just don't understand what it means from a practical standpoint. I understand your answer and have read the Release Notes. I do not have it installed and I have not needed it. I am not an expert, but it seems that there something extra in the file. Purge All, Audit Y and - Purge R *n, does not help.)

Is size the only difference or is there C3D info included that will trigger the need of a C3D object enabler for use with AutoCAD?ĮDIT: 05-08-22 - I created a shortcut as resulting Acad.dwt based one line file is 32 KB, vs 442 KB for the Civil 3D Drafting and Annotation version. Something seems different between 'Civil 3D 2022 as AutoCAD' and 'Civil 3D 2023 Drafting and annotation workspace' drawings. When I open a drawing with 2023 C3D, add one line, and save I get a 946 KB file. When I open a drawing with 2023 C3D select Drafting and Annotation workspace, start a new drawing using acad.dwt, add one line, and save, I get a 442 KB file. When I open a drawing with 2022 C3D, add one line, and save, I get a 941 KB file. When I open a drawing with 2022 C3D as AutoCAD, add one line, and save, I get a 24 KB file. I guess that I don't fully understand what Civil 3D as AutoCAD actually meant.

Autocad civil 3d 2019