Netbeans

I want to use Netbeans as an IDE. I was following this tutorial:

http://wiki.blender.org/index.php/Dev:Doc/IDE_Configuration/Linux_CMake_NetBeans#Starting_out

I seem to having trouble running the following script:

python3 BLENDER_SOURCE/build_files/cmake/cmake_netbeans_project.py BLENDER_BUILD

Any help would most appreciated.