1. Create a web project with the following settings:
  Project shared with others: yes
  Use local server installation registered in the IDE
  Framework: Visual Web JavaServer Faces

2. Exit the IDE, delete the nbproject/private directory (to simulate sharing with other users)
3. Run ant from the command line from the project dir

=> Compilation errors appear complaining that:

javax.faces does not exist
    [javac] import javax.faces.FacesException;


The correct behavior is that Ant should display an intelligible error message explaining to the user how the project
properties file should be corrected so the project is buildable from the command line. 

Workaround: start NetBeans, open this project in NetBeans and let NetBeans create the private directory. However, this
workaround is not acceptable, as we want this scenario to work on a continuous build machine (which may not have
NetBeans installed) and on the machines of other developers on the team, who may not use NetBeans as their IDE.
Also, from the error message the user can not tell that starting NetBeans will help.