<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:large">
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">Dear experts of quantum espresso,</p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">I am doing relaxation and the problem is that the total force is decreasing
until the 4<sup>th</sup> scf, then start to increase gradually. The system does
not converge. Actually, I need to calculate the band structure and see the band
gap of Armchair graphene ribbon. The ribbon width is composed of 17 carbon
atoms (N=3p+2 family), so it is metallic. I have one unit cell of the ribbon. I read in this mailing list many useful
discussions about suitable input for metallic systems and I followed them as I
understand. The version of quantum espresso is 6.1.<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">I tried many options of the input script but all the runs
have the same problem, total force is decreasing until the 4<sup>th</sup> scf
then start to increase gradually. This is a complete version of my input:<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">&CONTROL<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>calculation='relax',<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>outdir='.\Work',<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>prefix='Arm17',<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span>
</span>pseudo_dir='C:\qe-6.1\pseudo',<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>verbosity='high',<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>etot_conv_thr=
1.0D-3,<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span>
</span>forc_conv_thr=1.0d-2,<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">/<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">&SYSTEM<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>ibrav=8,<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>a=41.1089d0,<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>b=4.26258d0,<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>c=20.0d0,<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>nat=34,<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>ntyp=1,<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>ecutwfc=65,<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>ecutrho=520,<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>nbnd=76 <span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span>
</span>occupations='smearing',<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span>
</span>smearing='marzari-vanderbilt',<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>degauss=0.001d0,<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">/<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">&ELECTRONS<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>conv_thr=1d-06,<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span>
</span>mixing_beta=0.7d0,<span> </span><span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span>
</span>mixing_mode='local-TF'<span> </span><span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>mixing_ndim=12<span> </span><span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>diagonalization='cg'<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">/<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">&IONS<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">/<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">ATOMIC_SPECIES<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C 12.010700d0
C.pbe-rrkjus.UPF<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">ATOMIC_POSITIONS {crystal}<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.0336555229d0<span> </span>0.6666666956d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.0919486003d0<span> </span>0.8333333913d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.0336555229d0<span> </span>0.3333333044d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.1502416777d0<span> </span>0.6666666956d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.2085347551d0<span> </span>0.8333333913d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.0919486003d0<span> </span>0.1666666087d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.1502416777d0<span> </span>0.3333333044d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.2668277852d0<span> </span>0.6666666956d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.3251206731d0<span> </span>0.8333333913d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.2085347551d0<span> </span>0.1666666087d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.2668277852d0<span> </span>0.3333333044d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.3834141768d0<span> </span>0.6666666956d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.4417072068d0<span> </span>0.8333333913d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.3251206731d0<span> </span>0.1666666087d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.3834141768d0<span> </span>0.3333333044d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.5000002369d0<span> </span>0.6666666956d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.5582932669d0<span> </span>0.8333333913d0<span> </span><span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.4417072068d0<span> </span>0.1666666087d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.5000002369d0<span> </span>0.3333333044d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.6165862969d0<span> </span>0.6666666956d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.6748793269d0<span> </span>0.8333333913d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.5582932669d0<span> </span>0.1666666087d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.6165862969d0<span> </span>0.3333333044d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.7331723570d0<span> </span>0.6666666956d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.7914653870d0<span> </span>0.8333333913d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.6748793269d0<span> </span>0.1666666087d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.7331723570d0<span> </span>0.3333333044d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.8497584170d0<span> </span>0.6666666956d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.9080514470d0<span> </span>0.8333333913d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.7914653870d0<span> </span>0.1666666087d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.8497584170d0<span> </span>0.3333333044d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.9663444771d0<span> </span>0.6666666956d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.9080514470d0<span> </span>0.1666666087d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span>C<span> </span>0.9663444771d0<span> </span>0.3333333044d0<span> </span>0.5000000000d0<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">K_POINTS {automatic}<span></span></p>
<p class="gmail-MsoListParagraph" style="margin:0cm 0cm 8pt 23.4pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span><span>1<span style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:7pt;line-height:normal;font-family:"Times New Roman"">
</span></span></span><span dir="LTR"></span>50 <span> </span>1 <span> </span>0 <span> </span>0 <span> </span>0 <span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span> </span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">These are some of the many options that I have explored:<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">The above potential is ultrasoft, I used also norm
conserving (C.pbe-mt_gipaw.UPF). <span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">Smearing: I used methfessel-paxton and marzari-vanderbilt<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">Degause: I used 0.01 and 0.001<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">mixing_beta: I used 0.1 and 0.7<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">mixing_mode: I used local-TF and TF<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">mixing_ndim: I used 8 and 12 <span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">diagonalization: I used cg and david<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">ecutwfc: I used 65 and 75<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">ecutrho: with norm conserving (ecutwfc*4 and ecutwfc*10),
with ultrasoft (ecutwfc*8)<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">nbnd=76 (I have 34 atoms, so 136 valence electrons which
need 68 bands, because it is metallic I added 8 extra bands)<span></span></p>
<br clear="all"></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:large">
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">Previously I have successfully calculated the band structure
and band gap of semiconductor ribbon but I could not do the calculation of
metallic ribbon. I appreciate any help to solve my problem, why the forces
always increase after the 4<sup>th</sup> scf?</p></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:large"><br></div><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div dir="rtl"><div dir="ltr"><font color="#000000" face="georgia,serif"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif;font-size:large;display:inline">
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">Best Regards,<span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">Hind <span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">Lecturer, <span style="font-size:12pt">IT department</span></p><p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif"><span></span></p>
<p class="MsoNormal" style="margin:0cm 0cm 8pt;line-height:107%;font-size:12pt;font-family:Calibri,sans-serif">King Abdulaziz University<span></span></p>
<br></div></font></div></div></div></div></div>
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<div><font color="#808080" face="Arial, Helvetica, sans-serif">Disclaimer: The information contained in this message is intended for the addressee only and may contain classified information. If you are not the addressee, please delete this message and notify the sender; you should not copy or distribute this message or disclose its contents to anyone. Any views or opinions expressed in this message are those of the individual(s) and not necessarily of the university. No reliance may be placed on this message without written confirmation from an authorized representative of its contents. No guarantee is implied that this message or any attachment is virus free or has not been intercepted and amended. </font></div><div><font color="#808080" face="Arial, Helvetica, sans-serif"><br></font></div><div><font color="#808080" face="Arial, Helvetica, sans-serif">إخلاء مسؤليه: ان جميع المعلومات المتضمنة في هذه الرسالة تخص المستلم، وربما تتضمن معلومات سرية، واذا لم تكن انت المستلم فالرجاء الغاء الرسالة واشعار المرسل، كما يمنع نسخ او توزيع هذه الرسالة او افشاء محتوياتها لاخرين. ويجدر بالعلم ان جميع الآراء ووجهات النظر الواردة في هذه الرسالة تعتبر شخصية وليست بالضرورة منسوبة للجامعة. كما لايمكن ان يعتمد على هذه الرسالة ما لم تحصل على موافقة خطية من المسئول عن محتوياتها. كما لايوجد ضمان بان هذه الرسالة أو مرفقاتها خالية من الفيروسات أو انها لم يتم اعتراضها وتعديلها</font></div><div><br></div>