devstack 部署openstack, ./stack.sh neutron出现如下问题！

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2014-08-24 03:05:57.943 | + neutron_plugin_install_agent_packages

2014-08-24 03:05:57.943 | /home/devstack/devstack/lib/neutron: line 523: neutron_plugin_install_agent_packages: command not found

2014-08-24 03:05:57.943 | + exit_trap

2014-08-24 03:05:57.943 | + local r=127

2014-08-24 03:05:57.943 | ++ jobs -p

2014-08-24 03:05:57.943 | + jobs=

2014-08-24 03:05:57.943 | + [[ -n '' ]]

2014-08-24 03:05:57.943 | + kill_spinner

2014-08-24 03:05:57.943 | + '[' '!' -z '' ']'

2014-08-24 03:05:57.943 | + [[ 127 -ne 0 ]]

2014-08-24 03:05:57.943 | + echo 'Error on exit'

2014-08-24 03:05:57.943 | Error on exit

2014-08-24 03:05:57.943 | + [[ -z /home/devstack /logs ]]

2014-08-24 03:05:57.943 | + ./tools/worlddump.py -d $'/home/devstack\r/logs'

2014-08-24 03:05:57.994 | + exit 127