Thank you Adrien for detailed instructions.
I followed every step: Bind (my DWG is the only reference), Purge (All), Audit (0 errors), Save as 2004.
The import outcome in SKP remain the same.
As this is the first step in this SKP scene, I have no other layers might confuse or mixed.
Never the less I collect all imported DWG layers into one SKP layer named DWG, also changed color to this layer, just in case.
I only can select an empty rectangle in my SKP scene.
So I tried something else:
- DWG export to "other formats" -> type = Block (*.dwg)
- Import on SKP
- Collect all AutoCAD layers into single SKP layer and change its color.
and it works. Now I have my DWG in SKP as a layer.
Thank you again