<div dir="ltr"><div>It would be important to know whether any of those errors is reproducible on a different machine<br><br></div>Paolo<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Jun 5, 2018 at 9:01 AM, Ian Shuttleworth <span dir="ltr"><<a href="mailto:shuttleworth.ian@gmail.com" target="_blank">shuttleworth.ian@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Dear QE community</div><div><br></div><div>I have qe-6.2 installed using Intel/15.0.2 and OpenMPI/2.1.1-intel15</div><div><br></div><div>The build completes successfully and I'm able to execute pw.x from scratch with no problems. </div><div><br></div><div>However, if I save the wavefunctions to disk and subsequently try to re-read them using restart or another QE application (e.g. projwfc.x) I get</div><div><br></div><div>from davcio :<br><span><span>i/o error in davcio<br></span></span></div><div><br></div><div>The error only appears if I am using a vdW correction, though the error arises whether or not I use wf_collect.</div><div>If use neb.x the simulation stalls after the first iteration with a similar error, whether or not I am using vdW corrections.</div><div><br></div><div>I've tried the usual strategies (judging by posts already in the forum) of varying the number of k points against the number of nodes / cores but with no luck. I therefore suspect this problem may be arising because of the interaction between QE and the gpfs filesystem that I'm using. I therefore wanted to know if anyone else has experience of this type of filesystem / file-writing problem and if so, how they configured their installation.</div><div><br></div><div>The best archived reference I could find about this type of issue is a little dated, for a different system than the one I'm using and not entirely the same issue that I've outlined, so I wanted to know if any other group is facing problems with file writing, particularly with gpfs:</div><div><br></div><div><a href="https://www.mail-archive.com/users@lists.quantum-espresso.org/msg14495.html" target="_blank">https://www.mail-archive.com/<wbr>users@lists.quantum-espresso.<wbr>org/msg14495.html</a></div><div><br></div><span><div>With thanks</div><div><br></div><div>Ian Shuttleworth</div><div><br></div><div>(Nottingham Trent University, UK)<span><span><br></span></span></div><span></span></span></div>
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