Shows bug in xdsm writer.

gistfile1.txt

from __future__ import print_function, division, absolute_import

from openmdao.api import Problem, Group, IndepVarComp, ExplicitComponent
from openmdao.api import view_model
from openmdao.devtools.xdsm_viewer.xdsm_writer import write_xdsm


class TimeComp(ExplicitComponent):

    def setup(self):
        self.add_input('t_initial', val=0.)
        self.add_input('t_duration', val=1.)
        self.add_output('time', shape=(2, ))

    def compute(self, inputs, outputs):
        t_initial = inputs['t_initial']
        t_duration = inputs['t_duration']

        outputs['time'][0] = t_initial
        outputs['time'][1] = t_initial + t_duration


class Phase(Group):

    def setup(self):
        super(Phase, self).setup()

        indep = IndepVarComp()
        for var in ['t_initial', 't_duration']:
            indep.add_output(var, val=1.0)

        self.add_subsystem('time_extents', indep, promotes_outputs=['*'])

        time_comp = TimeComp()
        self.add_subsystem('time', time_comp)

        self.connect('t_initial', 'time.t_initial')
        self.connect('t_duration', 'time.t_duration')

        self.set_order(['time_extents', 'time'])


p = Problem()

orbit_phase = Phase()
p.model.add_subsystem('orbit_phase', orbit_phase)

systems_phase = Phase()
p.model.add_subsystem('systems_phase', systems_phase)

systems_phase = Phase()
p.model.add_subsystem('extra_phase', systems_phase)

p.setup(check=True)

p.run_model()

view_model(p)
write_xdsm(p, 'zzz', out_format='tex')
print('done')