Try opening the DWG as a library object (FILE menu > Libraries & Objects > Open Object).
You will need to change the file type to DWG.
Then save this as an object and see what you get.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11