I have a composite wall which has 2 layers of plasterboard on the inner face. The skins have a gypsum fill and a separator line, and the 'Use Skin Separator line' box is checked. So far so good.
Now I have another similar wall, also with 2 layers of plasterboard, set up in exactly the same way - but Archicad insists on merging these 2 skins, and not showing the separator line.
I thought that the fills might be obscuring the separator line - but if I explode a section of wall, I find that there really is only one skin in place of my two.
Has anyone any ideas?