Complexconjugate

Hi Olivier,
actually to generate events the process q q~ > w+ > h+ h2 , h+ > h1 w+ when i run the process i get this message below, what that means.
Traceback (most recent call last):
  File "write_param_card.py", line 178, in <module>
    ParamCardWriter('./param_card.dat', generic=True)
  File "write_param_card.py", line 29, in __init__
    self.write_card(list_of_parameters)
  File "write_param_card.py", line 89, in write_card
    self.write_dep_param_block(lhablock)
  File "write_param_card.py", line 121, in write_dep_param_block
    exec("%s = %s" % (parameter.name, parameter.value))
  File "<string>", line 1, in <module>
NameError: name 'complexconjugate' is not defined