Saving Physics Builder files works in the same way as ordinary model files (*.mph) except that it has the extension mphphb. Opening a file is also similar to opening MPH-files, but select Physics Builder File (*.mphphb) from the list of file types in the Open dialog box.
• See The Physics Builder Manager for more information about organizing development files.
• Saving COMSOL Files in the COMSOL Multiphysics Reference Manual