What is a BPN file? A BPN file is an autosaved backup file created by GRAPHISOFT Archicad, a BIM (Building Information Modeling) program used to design and construct buildings. It saves a backup copy of the current project ( .PLN file) automatically created by the software if the backup option is set in the application's "Data Safety & Integrity" preferences.

More Information Project Backup (BPN file) restored as a Solo Project (PLN file) in GRAPHISOFT Archicad 26 Archicad is a building information modeling (BIM) application for designing and visualizing structures, interiors, exteriors, and landscapes. When working on a project, your system may suddenly crash, causing you to lose your work. However, Archicad provides an auto-save capability that backs up your work for you automatically. How to create a BPN file with Archicad To enable this capability, select Options → Work Environment > Data Safety & Integrity and check the "Make Backup Copy" checkbox. After choosing this option, Archicad will create BPN files at regular intervals based on user-specified application preferences. The backup is saved to the same directory as the PLN project file. Additionally, if the project file becomes corrupted, you can rename the .bpn extension to .pln and use the backup as your main project file.