Open the DWG in AutoCAD or NanoCAD. Purge all unused layers ( PU command), explode blocks, and delete non-essential annotations. A messy DWG creates a messy PLN.
But Archicad doesn’t speak the native language of .dwg . It speaks .pln . dwg to pln converter
Pros: No software install, free for small files. Cons: You are uploading proprietary building plans to a random server (Privacy Risk). Usually, they output a "dumb" 3D model (Triangulated mesh), not a smart PLN with walls and windows. Tools like BIMDeX or Okino PolyTrans are enterprise-grade DWG to PLN converters. Open the DWG in AutoCAD or NanoCAD
New SaaS tools are emerging that use machine learning to look at a DWG floor plan and automatically generate a wall network in PLN format. These convert not just lines, but architectural logic (recognizing wall joins and room boundaries). But Archicad doesn’t speak the native language of