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Hi.<br>
There is an issue with constraints.<br>
H atom position is not uniquely defined with the constraints you use.<br>
Try these constraints (substitute symbols with numbers)<br>
<br>
1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; rC-H<br>
1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; rC-CL<br>
1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; rC-CL<br>
1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; rC-CL<br>
2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; rH-CL<br>
2&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4 &nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; rH-CL<br>
3&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 4&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp; &nbsp;&nbsp; rCL-CL<br>
3 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5 &nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rCL-CL&nbsp; <br>
4&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 5 &nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rCL-CL&nbsp; <br>
<br>
DD<br>
<br>
<br>
On 02/02/2011 06:20 PM, <a class="moz-txt-link-abbreviated" href="mailto:vferrario@units.it">vferrario@units.it</a> wrote:
<blockquote cite="mid:20110202172022.68102j0fg5vabhog@wmail1.units.it"
 type="cite">The dynamic works, but I still have the same problems with
minimization...
  <br>
  <br>
  <br>
"Justin A. Lemkul" <a class="moz-txt-link-rfc2396E" href="mailto:jalemkul@vt.edu">&lt;jalemkul@vt.edu&gt;</a> ha scritto:
  <br>
  <br>
  <blockquote type="cite"><br>
    <br>
<a class="moz-txt-link-abbreviated" href="mailto:vferrario@units.it">vferrario@units.it</a> wrote:
    <br>
    <blockquote type="cite">Ok and which definition have you used? the
previous one with 5 atom for molecule?
      <br>
      <br>
    </blockquote>
    <br>
Yes.
    <br>
    <br>
-Justin
    <br>
    <br>
    <blockquote type="cite">"Justin A. Lemkul" <a class="moz-txt-link-rfc2396E" href="mailto:jalemkul@vt.edu">&lt;jalemkul@vt.edu&gt;</a>
ha scritto:
      <br>
      <br>
      <blockquote type="cite"><br>
        <br>
<a class="moz-txt-link-abbreviated" href="mailto:vferrario@units.it">vferrario@units.it</a> wrote:
        <br>
        <blockquote type="cite">Just the last thing... can you copy
your mdp file? I think I'm having some problems also with that...
Thanks.
          <br>
          <br>
        </blockquote>
        <br>
For EM, I used the .mdp file you posted in your first message and added
the line "continuation = yes."&nbsp; For MD, I changed nstlist from 100 to
5.
        <br>
        <br>
-Justin
        <br>
        <br>
        <blockquote type="cite">Valerio
          <br>
          <br>
          <br>
"Justin A. Lemkul" <a class="moz-txt-link-rfc2396E" href="mailto:jalemkul@vt.edu">&lt;jalemkul@vt.edu&gt;</a> ha scritto:
          <br>
          <br>
          <blockquote type="cite"><br>
            <br>
Justin A. Lemkul wrote:
            <br>
            <br>
&lt;snip&gt;
            <br>
            <br>
            <blockquote type="cite">I've obtained a stable trajectory
for a single CHCL3 molecule.&nbsp; By setting "continuation = no" (so that
constraints are not solved before step 0) in the em.mdp file, and then
reducing nstlist to 5 in md.mdp, I
              <br>
            </blockquote>
            <br>
Ack, this should be "continuation = yes."&nbsp; Sorry for the confusion.&nbsp; I
will copy from my .mdp file...I will copy from my .mdp file... :)
            <br>
            <br>
-Justin
            <br>
            <br>
--&nbsp;<br>
========================================
            <br>
            <br>
Justin A. Lemkul
            <br>
Ph.D. Candidate
            <br>
ICTAS Doctoral Scholar
            <br>
MILES-IGERT Trainee
            <br>
Department of Biochemistry
            <br>
Virginia Tech
            <br>
Blacksburg, VA
            <br>
jalemkul[at]vt.edu | (540) 231-9080
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--&nbsp;<br>
========================================
        <br>
        <br>
Justin A. Lemkul
        <br>
Ph.D. Candidate
        <br>
ICTAS Doctoral Scholar
        <br>
MILES-IGERT Trainee
        <br>
Department of Biochemistry
        <br>
Virginia Tech
        <br>
Blacksburg, VA
        <br>
jalemkul[at]vt.edu | (540) 231-9080
        <br>
<a class="moz-txt-link-freetext" href="http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin">http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin</a>
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    <br>
Justin A. Lemkul
    <br>
Ph.D. Candidate
    <br>
ICTAS Doctoral Scholar
    <br>
MILES-IGERT Trainee
    <br>
Department of Biochemistry
    <br>
Virginia Tech
    <br>
Blacksburg, VA
    <br>
jalemkul[at]vt.edu | (540) 231-9080
    <br>
<a class="moz-txt-link-freetext" href="http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin">http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin</a>
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