Where is this purple color coming from?

[Richard Morrison]

I am drawing an existing house, and cannot figure out where this purple color is coming from. It is clear that it is related to the surfaces on the walls, since I can override them with other colors. Right now the purple corresponds to the "GENERAL" material. But I have no purple pens or any other purple materials or surfaces that I can find. Nothing in 3D view filters, or renovation overrides. This is really my first project in 19. Is the GENERAL surface purple now? What am I missing?

[Eduardo Rolon]

tvigilance wrote:
Hello I'm having trouble with my 3D view settings. Every time I go to it after updating my program to Archicad20 it show s in all purple and black checker pattern. Is there a way to fix this?

Barry answered the questioned. Basically it means you are missing some materials from your file therefore you have to re-assign another material to the element that is missing it.