I am trying to check the convergence test of the total energy of the system as 
a function of cut off energy for MoS2 as first step in QE calculation

My input file is attached, i am getting error # 17
I am new to QE,
Any help will be highly appreciated

This program is part of the open-source Quantum ESPRESSO suite
???? for quantum simulation of materials; please acknowledge
???????? "P. Giannozzi et al., J. Phys.:Condens. Matter 21 395502 (2009);
????????? URL http://www.quantum-espresso.org";, 
???? in publications or presentations arising from this work. More details at
???? http://www.quantum-espresso.org/wiki/index.php/Citing_Quantum-ESPRESSO

???? Current dimensions of program PWSCF are:
???? Max number of different atomic species (ntypx) = 10
???? Max number of k-points (npk) =? 40000
???? Max angular momentum in pseudopotentials (lmaxx) =? 3
???? Waiting for input...

?%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
???? from? read_namelists? : error #??????? 17
????? reading namelist system 
?%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

???? stopping ...

&control
??? calculation='scf',
??? restart_mode='from_scratch',
??? prefix='MoS2',
??? pseudo_dir = '/home/sohail/espresso-4.2.1/pseudo/',
??? outdir='./OUT'
?/
?&system
??? ibrav = 4, celldm(1) = 3.16, celldm(3) = 3.89, nat=? 6, ntyp= 2,
??? ecutwfc = $i,
??? ecutrho = 500,
??? nbnd = 10,
??? occupations='smearing', smearing=' gaussian', degauss=0.001,
??? nspin=2,
??? starting_magnetization(1)=0.5d0,
/
&electrons
??? mixing_beta = 0.3
??? conv_thr =? 1.0d-9
?/
ATOMIC_SPECIES 
Mo?? 95.96?? Mo.pw91-n-van.UPF
S??? 32.06?? S.pw91-van_ak.UPF
ATOMIC_POSITIONS {crystal}
Mo? 0.33333333? 0.66666667? 0.25000000
Mo? 0.66666667? 0.33333333? 0.75000000
S?? 0.33333333? 0.66666667? 0.62000000
S?? 0.66666667? 0.33333333? 0.12000000
S?? 0.66666667? 0.33333333 -0.62000000
S?? 0.33333333? 0.66666667 -0.12000000
K_POINTS AUTOMATIC
4 4 4 1 1 1

Thanks
Sohail
KKU
Saudi Arabia

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