Dear Wang, is a strange error message. Can you try with the svn espresso version (some small bug have been fixed there for neb)? you can download it at <a href="http://qe-forge.org/scm/?group_id=10">http://qe-forge.org/scm/?group_id=10</a><br>
<br>bests<br><br>Layla<br><br><div class="gmail_quote">2011/7/18 WANG Wei <span dir="ltr">&lt;<a href="mailto:wonvein@gmail.com">wonvein@gmail.com</a>&gt;</span><br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Dear QE users,<br><br>When I performed a NEB test (example17) by using the command &quot;neb.x -inp H2+H.in  &gt; H2+H.out&quot;, an error occurs:   <br><br>parsing_file_name: H2+H.in<br>PGFIO-F-209/OPEN/unit=99/&#39;OLD&#39; specified for file which does not exist.<br>

 File name = H2+H.in<br> In source file path_gen_inputs.F90, at line number 27<br><br>By the way, the example17 is always failed.  I have no idea about it because I am a new learner.<br><br>#######################################################<br>

BEGIN<br>BEGIN_PATH_INPUT<br>&amp;PATH<br>  restart_mode      = &#39;from_scratch&#39;<br>  string_method     = &#39;neb&#39;,<br>  nstep_path        = 20,<br>  ds                = 2.D0,<br>  opt_scheme        = &quot;broyden&quot;,<br>

  num_of_images     = 11,<br>  k_max             = 0.3D0,<br>  k_min             = 0.2D0,<br>  CI_scheme         = &quot;auto&quot;,<br>  path_thr          = 0.1D0,<br>/<br>END_PATH_INPUT<br>BEGIN_ENGINE_INPUT<br>&amp;CONTROL<br>

  prefix         = &quot;H2+H&quot;<br>  outdir         = &quot;/home/wangvei/tmp&quot;,<br>  pseudo_dir     = &quot;/home/wangvei/works/quantum-espresso/espresso-4.3.1/pseudo&quot;,<br>/<br>&amp;SYSTEM<br>  ibrav                  = 0,<br>

  celldm(1)              = 1.D0,<br>  nat                    = 3,<br>  ntyp                   = 1,<br>  ecutwfc                = 20.0D0,<br>  ecutrho                = 100.0D0,<br>  nspin                  = 2,<br>  starting_magnetization = 0.5D0,<br>

  occupations            = &quot;smearing&quot;,<br>  degauss                = 0.03D0,<br>/<br>&amp;ELECTRONS<br>  conv_thr    = 1.D-8,<br>  mixing_beta = 0.3D0,<br>/<br>&amp;IONS<br>/<br>ATOMIC_SPECIES<br>H  1.00794  HUSPBE.RRKJ3<br>

BEGIN_POSITIONS<br>FIRST_IMAGE<br>ATOMIC_POSITIONS { bohr }<br>H   -4.56670009      0.00000000      0.00000000  1  0  0<br>H    0.00000000      0.00000000      0.00000000  0  0  0<br>H    1.55776676      0.00000000      0.00000000  1  0  0<br>

LAST_IMAGE<br>ATOMIC_POSITIONS { bohr }<br>H   -1.55776676      0.00000000      0.00000000<br>H    0.00000000      0.00000000      0.00000000<br>H    4.56670009      0.00000000      0.00000000<br>END_POSITIONS<br>K_POINTS { gamma }<br>

CELL_PARAMETERS { cubic }<br>  12.00000  0.00000  0.00000<br>   0.00000  5.00000  0.00000<br>   0.00000  0.00000  5.00000<br>END_ENGINE_INPUT<br>END<br>#######################################################<br><br>Best Regards,<br>
<font color="#888888">
WANG <span><a href="http://dict.youdao.com/search?q=new&amp;keyfrom=E2Ctranslation" target="_blank"></a></span><span></span>
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<br></blockquote></div><br>