Python program output not coming . Process finished with exit code -1073741819 (0xC0000005)

I am running my tricontour Python code in PyCharm and I am getting aruntime error. Here is my current code:

tri_new = pd.read_table('fort.ele', delim_whitespace=True,names=('A','B','C','D'), usecols=[1,2,3], skiprows=1, dtype={'D':np.int})

dateList = []
for result in perdelta(strt, strt+timedelta(days=3), timedelta(hours=3)):
    dat=result

    dt =parse(str(dat))
    y=dt.year
    mn=dt.month
    d=dt.day
    hr=dt.hour
    mi=dt.minute

    if  hr<10:

        hr='0'+str(hr)
    else:
        d=str(d)
        hr=str(hr)
    varname='Hsig_'+str(y)+'0'+str(mn)+str(d)+'_'+hr+'0000'
    z=(datamat[varname]).squeeze()

    x0=-5
    y0=52
    x = Xp.squeeze()
    y = Yp.squeeze()

    start=time.clock()

    triang=tri.Triangulation(x,y)
    plt.tricontour(x,y,z,15)
    plt.tricontourf(x,y,z,15)

    plt.plot(x,y)
    plt.show()

Error:

C:\Users\incois-sms\Python\lib\site-packages\numpy\core\_methods.py:26: RuntimeWarning: invalid value encountered in reduce
  return umr_maximum(a, axis, None, out, keepdims)
C:\Users\incois-sms\Python\lib\site-packages\numpy\core\_methods.py:29: RuntimeWarning: invalid value encountered in reduce
  return umr_minimum(a, axis, None, out, keepdims)
C:\Users\incois-sms\Python\lib\site-packages\matplotlib\contour.py:1169: RuntimeWarning: invalid value encountered in greater
  inside = (self.levels > self.zmin) & (self.levels < self.zmax)
C:\Users\incois-sms\Python\lib\site-packages\matplotlib\contour.py:1169: RuntimeWarning: invalid value encountered in less
  inside = (self.levels > self.zmin) & (self.levels < self.zmax)
C:\Users\incois-sms\Python\lib\site-packages\matplotlib\contour.py:1173: UserWarning: No contour levels were found within the data range.
  warnings.warn("No contour levels were found"
C:\Users\incois-sms\Python\lib\site-packages\matplotlib\colors.py:504: RuntimeWarning: invalid value encountered in less
  xa[xa < 0] = -1
Process finished with exit code -1073741819 (0xC0000005)