Why are My Library Parts Missing?

In Archicad, you can store objects and textures inside the project (so called Embedded Library) or in external locations (so called Linked library). To check and manage the project libraries use the Library Manager.

If a linked library is not accessible by Archicad, library elements have a “missing” state and they are displayed with a solid spot placeholder in place of the original element’s origin point in floor plan view. Missing library parts are also listed in the Library Manager dialog.

Find out more: https://helpcenter.graphisoft.com/troubleshooting/3d-modeling/library-troubleshooting-guide/how-to-detect-and-clear-missing-library-parts/