demos.optics.ex6.py does not work

[sergey-tomin]

Traceback (most recent call last):
File "C:/Users/tomins/Documents/Dropbox/DESY/repository/ocelot/demos/optics/ex6.py", line 92, in
s2 = fwhm(x,np.abs(of.mesh.points[:,of.ny/2]))
File "C:\Users\tomins\Documents\Dropbox\DESY\repository\ocelot\common\math_op.py", line 126, in fwhm
return x[downs[-1]] - x[ups[0]]
IndexError: list index out of range

[sergey-tomin]

Please fix or remove it