Export from ArchiCAD PLN to AutoCAD One single DWG file

It's better if you wach video.

Open Organizer - Publisher

In Publisher sets: New Publisher set
From Layout Book side to right new Publisher set drag files

Now in Format, choose DWG for every single files and then clickTanslators

Here duplicate For further editing and rename it to name you choose

and now important

important First select:

Place drawings into: Single DXF/DWG file

and after that select

Save Layout into: Model Space

Now clik Save setting & Close

All files must be under Folder:

Now choose that folder in Check Merge to one DWG file

once more check that it's choosen right translator

and just click Publish