chkconfig exits with a non-zero code.

Issue

• Running a chkconfig [service] command results in a non-zero exit code:

  # chkconfig ntpd ; echo $?
  1
  

• From the man-page for chkconfig:

     When chkconfig is run with only a service name, it checks to see if  the  service
     is  configured to be started in the current runlevel. If it is, chkconfig returns
     true; otherwise it returns false. The --level option may be used to have  chkcon-
     fig query an alternative runlevel rather than the current one.
  

• What is causing this to fail?