Remap g-code: Wait for ngc commands to complete?

from interpreter import *
from emccanon import MESSAGE
import hal
from time import sleep, time
throw_exceptions = 1

def M33(self, **words):
    if not hal.get_value('welder.wc_ready'):
        self.set_errormsg('Weld controller is not ready')
        return INTERP_ERROR
    
    if hal.get_value('welder.touch_start'):
        # Enable touch sense:
        touch_sense = hal.get_value('welder.touch_sense')
        if touch_sense:
            # Shouldn't happen
            self.set_errormsg('M33 called but touch sense already enabled')
            return INTERP_ERROR
        else:
            hal.set_p('welder.touch_sense', '1') # Value must be a string
        # Wait until touch sense has been enabled
        enabled = hal.get_value('welder.touch_sense_enabled')
        while not enabled:
            sleep(0.1)
            enabled = hal.get_value('welder.touch_sense_enabled')
        self.execute('G90')
        self.execute('G38.2 Z-10 F10')
        self.execute('G91')
        hal.set_p('welder.touch_sense', '0')
        hal.set_p('welder.welder_on', '1')
    return INTERP_OK

def M34(self, **words):
    self.execute('G91')
    self.execute('G1 Z-0.1 F300')
    self.execute('G90')

REMAP= M34 modalgroup=10 python=M34

emc/task/emctask.cc 69: interp_error: remap_finished: got -13 - not in cblock.remappings!
remap_finished: got -13 - not in cblock.remappings!