(Migrate from ARCHICAD 11 or earlier)
Beginning with ARCHICAD 12, Door/Window objects have been reprogrammed to display correctly in light of the partial structure display feature.
Doors and Windows migrated from older-version projects (version 11 and earlier) into ARCHICAD 21 will not be displayed properly if you use Partial Structure Display. These Door/Window objects are incompatible for the purposes of Partial Structure Display.
To address the issue of incompatible library parts, see Migrating Libraries and Objects from ARCHICAD 12 and Earlier.