[u'Traceback (most recent call last):\n', u'  File "/usr/lib/python2.7/site-packages/heat/openstack/common/rpc/amqp.py", line 462, in _process_data\n    **args)\n', u'  File "/usr/lib/python2.7/site-packages/heat/openstack/common/rpc/dispatcher.py", line 172, in dispatch\n    result = getattr(proxyobj, method)(ctxt, **kwargs)\n', u'  File "/usr/lib/python2.7/site-packages/heat/engine/service.py", line 63, in wrapped\n    return func(self, ctx, *args, **kwargs)\n', u'  File "/usr/lib/python2.7/site-packages/heat/engine/service.py", line 520, in create_stack\n    env, **common_params)\n', u'  File "/usr/lib/python2.7/site-packages/heat/engine/parser.py", line 107, in __init__\n    user_params=self.env.params)\n', u'  File "/usr/lib/python2.7/site-packages/heat/engine/hot/template.py", line 142, in parameters\n    user_params=user_params)\n', u'  File "/usr/lib/python2.7/site-packages/heat/engine/parameters.py", line 384, in __init__\n    schemata = self.tmpl.param_schemata()\n', u'  File "/usr/lib/python2.7/site-packages/heat/engine/hot/template.py", line 138, in param_schemata\n    for name, schema in params)\n', u'  File "/usr/lib/python2.7/site-packages/heat/engine/hot/template.py", line 138, in <genexpr>\n    for name, schema in params)\n', u'  File "/usr/lib/python2.7/site-packages/heat/engine/hot/parameters.py", line 109, in from_dict\n    label=schema_dict.get(HOTParamSchema.LABEL))\n', u'  File "/usr/lib/python2.7/site-packages/heat/engine/parameters.py", line 64, in __init__\n    label=label)\n', u'  File "/usr/lib/python2.7/site-packages/heat/engine/constraints.py", line 84, in __init__\n    raise InvalidSchemaError(_(\'Invalid type (%s)\') % self.type)\n', u'InvalidSchemaError: Invalid type (m1.nano)\n'].