CAD - Curve join produced more than one WIRE in PolyCurve

[vishalghuge2500]

I’ve tried forum solutions, but they didn’t work for me.
I have a single CAD file containing the column layout for five floors. I can create a Polycurve for four out of five floors, but the column lines for one floor are not cooperating.
All column lines are on the same layer. I also noticed a “+” sign when selecting the column lines on that floor, which I didn’t see with the column lines on the other floors.
clean2 07.11.23.dwg (39.1 KB)

[Mike.Buttery]

Start by doing a tidy up of the cad file

Then use a Group Curves node from archilab

Please remember when posting graphs it is preferable to provide a note for package nodes - shortcut <ctrl> + w