Hi Xie,

Are cctbx and phenix compatible with a 64 bit operating system?

Yes.

I have Ubuntu 8.04 (64 bit) installed on an Intel Core2 duo system.

Please try the source bundle: cctbx_python_252_bundle.selfx http://cci.lbl.gov/cctbx_build/ Let me know if there are any problems. Ralf