error in specific temperature calculation

[dsysoev]

I cannot calculate property for specific temperature

from iapws import IAPWS97
IAPWS97(T=623.15, x=0).t
`---------------------------------------------------------------------------
UnboundLocalError Traceback (most recent call last)
in ()
----> 1 IAPWS97(T=623.15, x=0).t

/usr/local/lib/python2.7/dist-packages/iapws/iapws97.pyc in init(self, **kwargs)
2690 def init(self, **kwargs):
2691 self.kwargs = IAPWS97.kwargs.copy()
-> 2692 self.call(**kwargs)
2693
2694 def call(self, **kwargs):

/usr/local/lib/python2.7/dist-packages/iapws/iapws97.pyc in call(self, **kwargs)
2697 if self.calculable:
2698 self.status = 1
-> 2699 self.calculo()
2700 self.msg = "Solved"
2701

/usr/local/lib/python2.7/dist-packages/iapws/iapws97.pyc in calculo(self)
2891 propiedades = _Region4(P, x)
2892 elif P > Ps_623 and x in (0, 1):
-> 2893 rho = 1./_Backward3_v_PT(P, T)
2894 propiedades = _Region3(rho, T)
2895 elif Tt <= T <= Tc and x == 0:

/usr/local/lib/python2.7/dist-packages/iapws/iapws97.pyc in _Backward3_v_PT(P, T)
1637 region = "t"
1638
-> 1639 return _Backward3x_v_PT(T, P, region)
1640
1641

UnboundLocalError: local variable 'region' referenced before assignment`

[jjgomera]

Solved in last commit, I think, try it

[dsysoev]

It works. Thank you!