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Hi John,</div>
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Somehow the documentation is inconsistent with the source code. I did a quick search in `Modules/set_vdw_corr.f90` and found the following:<br>
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```<br>
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$ grep -n -C 3 MBD Modules/set_vdw_corr.f90
<div>30- CASE( 'TS', 'ts', 'ts-vdw', 'ts-vdW', 'tkatchenko-scheffler' )</div>
<div>31- ts_vdw = .TRUE.</div>
<div>32-</div>
<div>33: CASE( 'MBD', 'mbd', 'many-body-dispersion' )</div>
<div>34- ts_vdw = .TRUE.</div>
<div>35- mbd_vdw = .TRUE.</div>
36-<br>
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```</div>
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Please try vdw_corr = 'mbd' instead, and I will check if the documentation in the development version has been fixed.</div>
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Thank you,</div>
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Hsin-Yu<br>
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<font color="#888888">--
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<div><span style="font-family:georgia,serif"><span style="color:rgb(102,102,102)">Hsin-Yu Ko</span></span></div>
<div><span style="font-family:georgia,serif"><span style="color:rgb(102,102,102)">Postdoctoral Research Fellow<br>
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<span style="font-family:georgia,serif"><span style="color:rgb(102,102,102)">Department of Chemistry and Chemical Biology<br>
</span></span><span><span style="font-family:georgia,serif"><span style="color:rgb(102,102,102)">Cornell University</span></span></span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> users <users-bounces@lists.quantum-espresso.org> on behalf of Stoppelman, John P <jstoppelman3@gatech.edu><br>
<b>Sent:</b> Monday, May 9, 2022 7:38 AM<br>
<b>To:</b> users@lists.quantum-espresso.org <users@lists.quantum-espresso.org><br>
<b>Subject:</b> [QE-users] PWSCF v.7.0 unknown vdw correction (vdw_corr): mbd_vdw.</font>
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<p class="x_MsoNormal">Hello,</p>
<p class="x_MsoNormal">I downloaded and compiled Quantum Espresso 7.0 from <a href="https://www.quantum-espresso.org/download-page/">
https://www.quantum-espresso.org/download-page/</a> and compiled using ‘./configure’ and ‘make all’. When I include the option:
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<p class="x_MsoNormal">vdw_corr = 'mbd_vdw'</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">in my input file for pw.x I get the warning: </p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal"> Message from routine set_vdw_corr:</p>
<p class="x_MsoNormal"> WARNING: unknown vdw correction (vdw_corr): mbd_vdw. No vdw correction used.</p>
<p class="x_MsoNormal"> </p>
<p class="x_MsoNormal">Is there something I’m missing for compiling libmbd with Quantum Espresso? I see ‘make’ does create a directory in qe-7.0 called MBD which seems to contain the source code for libmbd. Is there any other step I need to take? My linux OS
is RHEL 7.9 for reference.</p>
<p class="x_MsoNormal">Thanks for any potential help,</p>
<p class="x_MsoNormal">John Stoppelman</p>
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