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Thanks&nbsp;for tha answer. Well the file si.scf is in the&nbsp;subdirectory pw of directory espresso-4.1.2. I think it does not like&nbsp;the brackets &lt;&gt; around the file because it gives an error:<BR>
&nbsp;<BR>
bash:syntax error near unexpected toke 'newline' but then I remove the &lt;&gt; and it doesnt give any error but also doesnt produce anything as output file...I calkled output file si.scf.out<BR>
&nbsp;<BR>
&gt;prompt espresso-4.1.2/bin/pw.x si.scf si.scf.out<BR>
&nbsp;<BR>
but nothing produced in out dir...:(<BR>
<BR>&nbsp;<BR>&gt; Date: Wed, 24 Feb 2010 20:34:23 +0100<BR>&gt; From: nnlinh@sissa.it<BR>&gt; To: pw_forum@pwscf.org<BR>&gt; Subject: Re: [Pw_forum] cannot run the pw code<BR>&gt; <BR>&gt; Elie Moujaes wrote:<BR>&gt; &gt; Dear all,<BR>&gt; &gt; <BR>&gt; &gt; I am trying to run the pw code to execute a program `si.scf`<BR>&gt; &gt; <BR>&gt; &gt; but when I write the command<BR>&gt; &gt; &gt;prompt espresso-4.1.2/dir/bin/pw.x &lt;si.scf&gt; si.scf.out<BR>&gt; &gt; <BR>&gt; &gt; I get an error<BR>&gt; &gt; <BR>&gt; &gt; bash: si.scf: no such file or directory..what I am doing wrong? id the <BR>&gt; &gt; command line wrong? I know it is a preliminar question but I am <BR>&gt; &gt; beginner in computational physics<BR>&gt; The error told that: the input file is not available in the executable <BR>&gt; directory.<BR>&gt; Let check if the names of input file or directory are right or not?<BR>&gt; <BR>&gt; Linh<BR>&gt; &gt; Regards,<BR>&gt; &gt; Thanks<BR>&gt; &gt; <BR>&gt; &gt;<BR>&gt; &gt; ------------------------------------------------------------------------<BR>&gt; &gt; Do you have a story that started on Hotmail? Tell us now <BR>&gt; &gt; &lt;http://clk.atdmt.com/UKM/go/195013117/direct/01/&gt;<BR>&gt; &gt; ------------------------------------------------------------------------<BR>&gt; &gt;<BR>&gt; &gt; _______________________________________________<BR>&gt; &gt; Pw_forum mailing list<BR>&gt; &gt; Pw_forum@pwscf.org<BR>&gt; &gt; http://www.democritos.it/mailman/listinfo/pw_forum<BR>&gt; &gt; <BR>&gt; <BR>&gt; _______________________________________________<BR>&gt; Pw_forum mailing list<BR>&gt; Pw_forum@pwscf.org<BR>&gt; http://www.democritos.it/mailman/listinfo/pw_forum<BR>                                               <br /><hr />Do you want a Hotmail account? <a href='http://clk.atdmt.com/UKM/go/197222280/direct/01/' target='_new'>Sign-up now - Free</a></body>
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