: Click OK to reload the project. Your "missing objects" (often shown as purple dots or checkerboard patterns) should now appear correctly. Third-Party Sources for Legacy Objects Archicad Old Libraries from 2011 - Graphisoft Community
: If you are using a newer version of Archicad (e.g., AC26 or AC27) and need the 12 objects for a legacy project, look in your installation folder. Graphisoft typically includes a folder named "Old Archicad Migration Libraries" which often contains compatibility files for versions 10 through 12. Archicad 12 Library Download
Once you have located or downloaded the library files, follow these steps to add them to your current project: : Click OK to reload the project