Does anyone know how to ask modeller to generate the ini file and stop?

I tried the following but failed:

a = automodel(env, alnfile='my_alignment.ali',
              knowns='3mrb', sequence='query',
              assess_methods=assess.DOPE)
aln = alignment(env)
aln.append(file='T3mrb_Q1duz.ali')
a.transfer_xyz(aln)

Best,

Li