I am running the default example of Al, given in manual. i have calculated the Phonon band structure. 
I am facing following error in el_ph calculation. 
my code is following.
info.calculationType = 'dfpt-elph'
info.savepath = './results/al_real_elph'
rho.in = './results/al_real_scf.mat'
psi = './results/al_real_scf.h5'
dfpt.phononData = './results/al_real_phonon.mat' % path to DFPT phonon data
kpoint.gridn = [5,5,5]
dfpt.qpointGridn = [5,5,5]
dfpt.elphTemperature = linspace(5,300,6)
dfpt.elphSmearing = 'lorentz'
dfpt.elphZcut = 0.01
units.energy = 'eV'
