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    <p>As seen in past posts [1-3], those "Mult not equal" and "ityp not
      equal" errors typically can be solved by answering y to do you
      want to use the new .struct_nn file.  For example:<br>
    </p>
    <p>-----> DO YOU WANT TO USE THE NEW tetra.struct_nn file (y/n) y</p>
    <p>However, after answering y to take .struct_nn as your new .struct
      file.  Look at the new .struct in XCrySDen or VESTA [4] and in
      StructGen for checking yourself if the structure is as it should
      be.</p>
    <p>If the structure isn't as it should be, it could be that special
      labels are needed like that described at [5].<br>
    </p>
    <p>With elastic constants you distort the original 'crystal'
      structure [6], such that have to be careful not to destroy the
      crystal by putting the atomic positions to close to each other or
      too far apart.</p>
    Also, you will want to make sure you are using the latest version of
    WIEN2k (21.1).  As on the updates page [7], you can see that the nn
    program has an improvement for bond angles where is has under
    "VERSION_21: 10.4.2021":<br>
    <br>
    <b>SRC_nn</b>: calculates also bond angles
    <p>There is also a bug in the nn program of version 21.1 and older
      WIEN2k versions, the bug fix for the WIEN2k 21.1 version is at
      [8].  Instead of applying the fix by hand, if you prefer to use
      patch [9], there is a nn.patch that I made for that at [10].<br>
    </p>
    [1]
<a class="moz-txt-link-freetext" href="https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg05509.html">https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg05509.html</a><br>
    [2]
<a class="moz-txt-link-freetext" href="https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg07769.html">https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg07769.html</a><br>
    [3]
<a class="moz-txt-link-freetext" href="https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg20320.html">https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg20320.html</a><br>
    [4]
<a class="moz-txt-link-freetext" href="https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg21157.html">https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg21157.html</a><br>
    [5] <a class="moz-txt-link-freetext" href="http://susi.theochem.tuwien.ac.at/reg_user/faq/supercells.html">http://susi.theochem.tuwien.ac.at/reg_user/faq/supercells.html</a><br>
    [6]
<a class="moz-txt-link-freetext" href="https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg19372.html">https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg19372.html</a><br>
    [7] <a class="moz-txt-link-freetext" href="http://susi.theochem.tuwien.ac.at/reg_user/updates/">http://susi.theochem.tuwien.ac.at/reg_user/updates/</a><br>
    [8]
<a class="moz-txt-link-freetext" href="https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg21257.html">https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg21257.html</a><br>
    <div class="moz-cite-prefix">[9]
      <a class="moz-txt-link-freetext" href="https://en.wikipedia.org/wiki/Patch_(Unix)">https://en.wikipedia.org/wiki/Patch_(Unix)</a><br>
    </div>
    <div class="moz-cite-prefix">[10]
      <a class="moz-txt-link-freetext" href="https://github.com/gsabo/WIEN2k-Patches/tree/master/21.1">https://github.com/gsabo/WIEN2k-Patches/tree/master/21.1</a><br>
    </div>
    <div class="moz-cite-prefix"><br>
    </div>
    <div class="moz-cite-prefix">Kind Regards,</div>
    <div class="moz-cite-prefix">Gavin</div>
    <div class="moz-cite-prefix">WIEN2k user</div>
    <div class="moz-cite-prefix"><br>
    </div>
    <div class="moz-cite-prefix">On 7/23/2022 8:15 AM, upasana chauhan
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CAMyvU35UEwcdhphnpW4QBfhisfWX6=VuH1ywTTZR0k7TYvo4YA@mail.gmail.com">
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        <div>Dear SIr/Ma'am</div>
        <div>Greetings!</div>
        <div>During running tetra calculations in elastic properties, i
          am getting following error:</div>
        <div> <span></span>
          <p style="margin-bottom:0cm;line-height:100%">Use old or new
            scheme (o/N)</p>
          <p style="margin-bottom:0cm;line-height:100%">n</p>
          <p style="margin-bottom:0cm;line-height:100%"> specify
            nn-bondlength factor: (usually=2) [and optionally dlimit,
            dstmax
            (about</p>
          <p style="margin-bottom:0cm;line-height:100%"> 1.d-5, 20)]</p>
          <p style="margin-bottom:0cm;line-height:100%"> DSTMAX:
            23.5553344200000 </p>
          <p style="margin-bottom:0cm;line-height:100%"> iix,iiy,iiz 3 3
            5 63.3463350000000 </p>
          <p style="margin-bottom:0cm;line-height:100%">
            63.3463350000000 106.105110000000 </p>
          <p style="margin-bottom:0cm;line-height:100%"><br>
          </p>
          <p style="margin-bottom:0cm;line-height:100%"> ATOM 1 Na ATOM
            4 Br </p>
          <p style="margin-bottom:0cm;line-height:100%"> RMT( 1)=2.50000
            AND RMT( 4)=2.31000</p>
          <p style="margin-bottom:0cm;line-height:100%"> SUMS TO 4.81000
            LT. NN-DIST= 7.46544</p>
          <p style="margin-bottom:0cm;line-height:100%"><br>
          </p>
          <p style="margin-bottom:0cm;line-height:100%"> ATOM 2 Ag ATOM
            4 Br </p>
          <p style="margin-bottom:0cm;line-height:100%"> RMT( 2)=2.42000
            AND RMT( 4)=2.31000</p>
          <p style="margin-bottom:0cm;line-height:100%"> SUMS TO 4.73000
            LT. NN-DIST= 5.27886</p>
          <p style="margin-bottom:0cm;line-height:100%"><br>
          </p>
          <p style="margin-bottom:0cm;line-height:100%"> ATOM 3 Sb ATOM
            4 Br </p>
          <p style="margin-bottom:0cm;line-height:100%"> RMT( 3)=2.42000
            AND RMT( 4)=2.31000</p>
          <p style="margin-bottom:0cm;line-height:100%"> SUMS TO 4.73000
            LT. NN-DIST= 5.27886</p>
          <p style="margin-bottom:0cm;line-height:100%"><br>
          </p>
          <p style="margin-bottom:0cm;line-height:100%"> ATOM 4 Br ATOM
            3 Sb </p>
          <p style="margin-bottom:0cm;line-height:100%"> RMT( 4)=2.31000
            AND RMT( 3)=2.42000</p>
          <p style="margin-bottom:0cm;line-height:100%"> SUMS TO 4.73000
            LT. NN-DIST= 5.27886</p>
          <p style="margin-bottom:0cm;line-height:100%"> <b>WARNING:
              Mult
              not equal. PLEASE CHECK outputnn-file</b></p>
          <p style="margin-bottom:0cm;line-height:100%"> <b>WARNING:
              ityp
              not equal. PLEASE CHECK outputnn-file</b></p>
          <p style="margin-bottom:0cm;line-height:100%"> <b>WARNING:
              ityp
              not equal. PLEASE CHECK outputnn-file</b></p>
          <p style="margin-bottom:0cm;line-height:100%"> </p>
          <p style="margin-bottom:0cm;line-height:100%"> NN created a
            new
            tetra.struct_nn file</p>
          <p style="margin-bottom:0cm;line-height:100%">NN created a new
            CASE.STRUCT_NN FILE</p>
          <p style="margin-bottom:0cm;line-height:100%">0.0u 0.0s
            0:00.00
            0.0% 0+0k 0+80io 0pf+0w</p>
          <p style="margin-bottom:0cm;line-height:100%">atom Z RMT-max
            RMT </p>
          <p style="margin-bottom:0cm;line-height:100%"> 1 11.0 2.50000
            2.50000 </p>
          <p style="margin-bottom:0cm;line-height:100%"> 2 47.0 2.42
            2.42 </p>
          <p style="margin-bottom:0cm;line-height:100%"> 3 51.0 2.42
            2.42 </p>
          <p style="margin-bottom:0cm;line-height:100%"> 4 35.0 2.30
            2.30 </p>
          <p style="margin-bottom:0cm;line-height:100%">file
            tetra.struct_setrmt generated </p>
          <p style="margin-bottom:0cm;line-height:100%">Do you want to
            accept these radii; discard them; or rerun setRmt (a/d/r):</p>
          <p style="margin-bottom:0cm;line-height:100%">a</p>
          <p style="margin-bottom:0cm;line-height:100%"> next is nn </p>
          <p style="margin-bottom:0cm;line-height:100%">> nn
            (19:38:04) specify nn-bondlength factor: (usually=2) [and
            optionally dlimit,
            dstmax (about</p>
          <p style="margin-bottom:0cm;line-height:100%"> 1.d-5, 20)]</p>
          <p style="margin-bottom:0cm;line-height:100%">3</p>
          <p style="margin-bottom:0cm;line-height:100%"> DSTMAX:
            23.5553344200000 </p>
          <p style="margin-bottom:0cm;line-height:100%"> iix,iiy,iiz 3 3
            5 63.3463350000000 </p>
          <p style="margin-bottom:0cm;line-height:100%">
            63.3463350000000 106.105110000000 </p>
          <p style="margin-bottom:0cm;line-height:100%"><br>
          </p>
          <p style="margin-bottom:0cm;line-height:100%"> ATOM 1 Na ATOM
            4 Br </p>
          <p style="margin-bottom:0cm;line-height:100%"> RMT( 1)=2.50000
            AND RMT( 4)=2.30000</p>
          <p style="margin-bottom:0cm;line-height:100%"> SUMS TO 4.80000
            LT. NN-DIST= 7.46544</p>
          <p style="margin-bottom:0cm;line-height:100%"><br>
          </p>
          <p style="margin-bottom:0cm;line-height:100%"> ATOM 2 Ag ATOM
            4 Br </p>
          <p style="margin-bottom:0cm;line-height:100%"> RMT( 2)=2.42000
            AND RMT( 4)=2.30000</p>
          <p style="margin-bottom:0cm;line-height:100%"> SUMS TO 4.72000
            LT. NN-DIST= 5.27886</p>
          <p style="margin-bottom:0cm;line-height:100%"><br>
          </p>
          <p style="margin-bottom:0cm;line-height:100%"> ATOM 3 Sb ATOM
            4 Br </p>
          <p style="margin-bottom:0cm;line-height:100%"> RMT( 3)=2.42000
            AND RMT( 4)=2.30000</p>
          <p style="margin-bottom:0cm;line-height:100%"> SUMS TO 4.72000
            LT. NN-DIST= 5.27886</p>
          <p style="margin-bottom:0cm;line-height:100%"><br>
          </p>
          <p style="margin-bottom:0cm;line-height:100%"> ATOM 4 Br ATOM
            3 Sb </p>
          <p style="margin-bottom:0cm;line-height:100%"> RMT( 4)=2.30000
            AND RMT( 3)=2.42000</p>
          <p style="margin-bottom:0cm;line-height:100%"> SUMS TO 4.72000
            LT. NN-DIST= 5.27886</p>
          <p style="margin-bottom:0cm;line-height:100%"> <b>WARNING:
              Mult
              not equal. PLEASE CHECK outputnn-file</b></p>
          <p style="margin-bottom:0cm;line-height:100%"> <b>WARNING:
              ityp
              not equal. PLEASE CHECK outputnn-file</b></p>
          <p style="margin-bottom:0cm;line-height:100%"> <b>WARNING:
              ityp
              not equal. PLEASE CHECK outputnn-file</b></p>
          <p style="margin-bottom:0cm;line-height:100%"> </p>
          <p style="margin-bottom:0cm;line-height:100%"> NN created a
            new
            tetra.struct_nn file</p>
          <p style="margin-bottom:0cm;line-height:100%">NN created a new
            CASE.STRUCT_NN FILE</p>
          <p style="margin-bottom:0cm;line-height:100%">0.0u 0.0s
            1:29.64
            0.0% 0+0k 0+176io 0pf+0w</p>
          <p style="margin-bottom:0cm;line-height:100%">-----> check
            in tetra.outputnn for overlapping spheres, </p>
          <p style="margin-bottom:0cm;line-height:100%"> coordination
            and nearest neighbor distances</p>
          <p style="margin-bottom:0cm;line-height:100%">nn has created a
            new
            struct file with different multiplicities</p>
          <p style="margin-bottom:0cm;line-height:100%">-----> DO YOU
            WANT TO USE THE NEW tetra.struct_nn file (y/n)</p>
          <p style="margin-bottom:0cm;line-height:100%"><br>
          </p>
        </div>
        <div>Kindly tell me the solution.</div>
        <div>Thank You!</div>
        <div>Best Regards!</div>
      </div>
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