The project cannot be built until build path errors are resolved

[Jeremy1980]

Project 'JBrickBuilder' is missing required Java project: 'AppSettings'
Project 'JBrickBuilder' is missing required Java project: 'BusyDialog' JBrickBuilder
Project 'JBrickBuilder' is missing required Java project: 'JSimple3DGeom'
Project 'JBrickBuilder' is missing required Java project: 'LDEditor'
Project 'JBrickBuilder' is missing required Java project: 'LDPovRay'
Project 'JBrickBuilder' is missing required Java project: 'LDraw3D'
Project 'JBrickBuilder' is missing required Java project: 'LDrawLib'
Project 'JBrickBuilder' is missing required Java project: 'SimpleUndo'