Before you make an AR scene, it’s best to place all the resource files (markers,sounds,pictures,videos to be used in the scene) in one folder first. This single folder will contain all the necessary files to load your AR scene.
If you don’t place all of the files together, BuildAR may not be able to find the content files when your scene is loaded.
Some users who run BuildAR on Windows 7 are experiencing crashes as a result of this issue.
One more tip!. When you use 3D model files such as .fbx, .ive files, it is important to place any texture file used in making the 3D model in the same folder with the model file.