Hi Liu: I would recommend trying the GE Users mail list at users@gridengine.sunsource.net to see if they can help. Joe Liu, Wei wrote: > I've tried to start sge_qmaster daemons to StartupItems of Mac OS X. > However, only the sge_qmaster has been started. sge_schedd cannot start. > /tmp/sge_messages: > can't create handle for communication -- Joseph Landman, Ph.D Founder and CEO Scalable Informatics LLC, email: landman@scalableinformatics.com web : http://www.scalableinformatics.com phone: +1 734 612 4615