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    <p>Folks,</p>
    <p>There was a problem with the last releases of halld_recon,
      including the recon-launch compatible releases that could cause
      simulation runs to crash. Sean found and fixed the error. The new
      version sets are</p>
    <ul>
      <li><a moz-do-not-send="true" href="https://halldweb.jlab.org/halld_versions/version_4.40.0.xml">version_4.40.0.xml</a></li>
      <li> <a moz-do-not-send="true" href="https://halldweb.jlab.org/halld_versions/recon-2017_01-ver03_28.xml">recon-2017_01-ver03_28.xml</a></li>
      <li><a moz-do-not-send="true" href="https://halldweb.jlab.org/halld_versions/recon-2018_01-ver02_20.xml">recon-2018_01-ver02_20.xml</a></li>
      <li><a moz-do-not-send="true" href="https://halldweb.jlab.org/halld_versions/recon-2018_08-ver02_19.xml">recon-2018_08-ver02_19.xml</a></li>
    </ul>
    <p>The new version of halld_recon is <a moz-do-not-send="true" href="https://github.com/JeffersonLab/halld_recon/releases/tag/4.27.1">version
        4.27.1</a>. The patched version of the recon-compatible
      halld_recon version sets are <a moz-do-not-send="true" href="https://github.com/JeffersonLab/halld_recon/releases/tag/recon-2017_01-ver03.6">recon-2017_01-ver03.6</a>,
      <a moz-do-not-send="true" href="https://github.com/JeffersonLab/halld_recon/releases/tag/recon-2018_01-ver02.5">recon-2018_01-ver02.5</a>,
      and <a moz-do-not-send="true" href="https://github.com/JeffersonLab/halld_recon/releases/tag/recon-2018_08-ver02.5">recon-2018_08-ver02.5</a>.<br>
    </p>
    <p>A new version of hdgeant4 is included in all of these version
      sets. See the <a moz-do-not-send="true" href="https://github.com/JeffersonLab/HDGeant4/releases/tag/2.24.0">release
        notes for version 2.24.0</a> for a list of changes in this
      release.</p>
    <p>version_4.40.xml becomes the default at JLab at midnight.<br>
    </p>
    <p>  -- Mark</p>
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