userspace python/HAL component not becoming ready

#!/usr/bin/env python
# encoding: utf-8
"""
Created by Brendan Erwin on 2008-05-21.
Copyright (c) 2008 Brendan Erwin. All rights reserved.

Slightly Modified by Tensaiteki on 2012-01-21

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

"""

import serial
import hal
import sys
import time

PORT = "/dev/ttyUSB0"

#allow the port to be overridden
if len(sys.argv) > 1:
    PORT = sys.argv[1]

#Establish serial link
ser = serial.Serial(PORT, 19200, timeout=2)

#Setup the HAL component and pins
c = hal.component("reprap-extruder")
c.newpin("temperature", hal.HAL_FLOAT, hal.HAL_IN)
c.ready()

data = ""

try:
	while 1:
		time.sleep(1)
		ser.write("M105\n")
		
		while ser.inWaiting():
			data += ser.read()

		if len(data) > 0:
			#print >> sys.stdout, data
			start = data.find("T:")
			if start <> -1:
				start += 2
				end = data.index("\r",start)
				print >> sys.stdout, data[start:end]
				c["temperature"] = int(data[start:end])
	
		data = ""
		
except KeyboardInterrupt:
    raise SystemExit

halcmd: loadusr -W /home/reprap/emc2/configs/reprap/reprap-extruder /dev/ttyUSB0
Waiting for component '/home/reprap/emc2/configs/reprap/reprap-extruder' to become ready.....................23
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..........^C
<stdin>:2: /home/reprap/emc2/configs/reprap/reprap-extruder exited without becoming ready

halcmd: loadusr -W /home/reprap/emc2/configs/reprap/reprap-extruder /dev/ttyUSB0
<stdin>:2: /home/reprap/emc2/configs/reprap/reprap-extruder exited without becoming ready
halcmd:

Print file information:
RUN_IN_PLACE=no
EMC2_DIR=
EMC2_BIN_DIR=/usr/bin
EMC2_TCL_DIR=/usr/share/emc/tcl
EMC2_SCRIPT_DIR=
EMC2_RTLIB_DIR=/usr/realtime-2.6.32-122-rtai/modules/emc2
EMC2_CONFIG_DIR=
EMC2_LANG_DIR=/usr/share/emc/tcl/msgs
INIVAR=inivar
HALCMD=halcmd
EMC2_EMCSH=/usr/bin/wish8.5
EMC2 - 2.4.6
Machine configuration directory is '/home/reprap/emc2/configs/reprap'
Machine configuration file is 'reprap.ini'
INIFILE=/home/reprap/emc2/configs/reprap/reprap.ini
PARAMETER_FILE=emc.var
EMCMOT=motmod
EMCIO=io
TASK=milltask
HALUI=halui
DISPLAY=axis
NML_FILE=
Starting EMC2...
Starting EMC2 server program: emcsvr
Loading Real Time OS, RTAPI, and HAL_LIB modules
Starting EMC2 IO program: io
Starting HAL User Interface program: halui
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Shutting down and cleaning up EMC2...
Killing task emcsvr, PID=18995
Removing HAL_LIB, RTAPI, and Real Time OS modules
Removing NML shared memory segments
Cleanup done

Debug file information:
Waiting for component '/home/reprap/emc2/configs/reprap/reprap-extruder' to become ready...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
custom.hal:6: /home/reprap/emc2/configs/reprap/reprap-extruder exited without becoming ready
18995
  PID TTY      STAT   TIME COMMAND
Stopping realtime threads
RTAPI: ERROR: could not open shared memory (errno=2)
HAL: ERROR: rtapi init failed
halcmd: hal_init() failed: -22
NOTE: 'rtapi' kernel module must be loaded
Unloading hal components
RTAPI: ERROR: could not open shared memory (errno=2)
HAL: ERROR: rtapi init failed
halcmd: hal_init() failed: -22
NOTE: 'rtapi' kernel module must be loaded
RTAPI: ERROR: could not open shared memory (errno=2)
HAL: ERROR: rtapi init failed
halcmd: hal_init() failed: -22
NOTE: 'rtapi' kernel module must be loaded
RTAPI: ERROR: could not open shared memory (errno=2)
HAL: ERROR: rtapi init failed
halcmd: hal_init() failed: -22
NOTE: 'rtapi' kernel module must be loaded
RTAPI: ERROR: could not open shared memory (errno=2)
HAL: ERROR: rtapi init failed
halcmd: hal_init() failed: -22
NOTE: 'rtapi' kernel module must be loaded
RTAPI: ERROR: could not open shared memory (errno=2)
HAL: ERROR: rtapi init failed
halcmd: hal_init() failed: -22
NOTE: 'rtapi' kernel module must be loaded
RTAPI: ERROR: could not open shared memory (errno=2)
HAL: ERROR: rtapi init failed
halcmd: hal_init() failed: -22
NOTE: 'rtapi' kernel module must be loaded
ERROR: Module hal_lib is in use by stepgen,hal_parport,probe_parport,motmod,trivkins
ERROR: Module rtapi is in use by stepgen,hal_parport,probe_parport,motmod,hal_lib
ERROR: Module rtai_math is in use by motmod
ERROR: Module rtai_sem is in use by rtapi
ERROR: Module rtai_fifos is in use by rtapi
ERROR: Module rtai_sched is in use by rtapi,rtai_sem,rtai_fifos
ERROR: Module rtai_hal is in use by rtapi,rtai_sem,rtai_fifos,rtai_sched

Kernel message information:
[188094.213601] I-pipe: Domain RTAI registered.
[188094.213620] RTAI[hal]: <3.8.1> mounted over IPIPE-NOTHREADS 2.6-03.
[188094.213627] RTAI[hal]: compiled with gcc version 4.4.3 (Ubuntu 4.4.3-4ubuntu5) .
[188094.213750] RTAI[hal]: mounted (IPIPE-NOTHREADS, IMMEDIATE (INTERNAL IRQs DISPATCHED), ISOL_CPUS_MASK: 0).
[188094.213756] PIPELINE layers:
[188094.213763] fba20e20 9ac15d93 RTAI 200
[188094.213769] c085cb20 0 Linux 100
[188094.261086] RTAI[malloc]: global heap size = 2097152 bytes, <BSD>.
[188094.261778] RTAI[sched]: IMMEDIATE, MP, USER/KERNEL SPACE: <with RTAI OWN KTASKs>, kstacks pool size = 524288 bytes.
[188094.261790] RTAI[sched]: hard timer type/freq = APIC/12500388(Hz); default timing: periodic; linear timed lists.
[188094.261797] RTAI[sched]: Linux timer freq = 250 (Hz), TimeBase freq = 1799590000 hz.
[188094.261803] RTAI[sched]: timer setup = 999 ns, resched latency = 2944 ns.
[188094.261932] RTAI[usi]: enabled.
[188094.354084] RTAI[math]: loaded.
[188094.484852] config string '0x378 out  '