You can quickly find library parts in AC9 with the new Find Library Parts feature.
Only proviso is the Wall Niche object is a Window, so you will have to search for it in the Window Settings Dialog.
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
AMD Ryzen9 5900X CPU, 64 GB RAM 3600 MHz, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), Windows 10 PRO ENG, Ac20-Ac28