<p class="MsoNormal"><span lang="EN-GB" style="font-family:Arial;mso-fareast-font-family:
"Times New Roman";color:black;mso-ansi-language:EN-GB">Dear All</span></p>

<p class="MsoNormal"><span lang="EN-GB" style="font-family:Arial;mso-fareast-font-family:
"Times New Roman";color:black;mso-ansi-language:EN-GB">I would like to know the
best way to restrict a dihedral angle during a simulation.</span><span lang="EN-GB" style="font-size:10.0pt;font-family:Times;mso-ansi-language:EN-GB"></span></p>

<p class="MsoNormal"><span lang="EN-GB" style="font-family:Arial;mso-fareast-font-family:
"Times New Roman";color:black;mso-ansi-language:EN-GB">Without any experience
about this, I tried to use a fictitious Colvar putting two walls to define the
space that the dihedral can freely explore.  Then, the program asks for a
value of the SCALE variable during the metadynamics calculation, and I set this
to 0.</span></p>

<p class="MsoNormal"><span lang="EN-GB" style="font-family:Arial;mso-fareast-font-family:
"Times New Roman";color:black;mso-ansi-language:EN-GB"> </span></p>

<p class="MsoNormal"><span lang="EN-GB" style="font-family:Arial;mso-fareast-font-family:
"Times New Roman";color:black;mso-ansi-language:EN-GB">However, I'm not sure
that this is the correct solution to my problem.</span></p>

<p class="MsoNormal"><span lang="EN-GB" style="font-family:Arial;mso-fareast-font-family:
"Times New Roman";color:black;mso-ansi-language:EN-GB"> </span></p>

<p class="MsoNormal"><span lang="EN-GB" style="font-family:Arial;mso-fareast-font-family:
"Times New Roman";color:black;mso-ansi-language:EN-GB">Can somebody suggest me
other solutions?</span></p>

<p class="MsoNormal"><span lang="EN-GB" style="font-family:Arial;mso-fareast-font-family:
"Times New Roman";color:black;mso-ansi-language:EN-GB"> </span></p>

<p class="MsoNormal"><span lang="EN-GB" style="font-family:Arial;mso-fareast-font-family:
"Times New Roman";color:black;mso-ansi-language:EN-GB">Thanks</span></p>

<p class="MsoNormal"><span lang="EN-GB" style="font-family:Arial;mso-fareast-font-family:
"Times New Roman";color:black;mso-ansi-language:EN-GB"> </span></p>

<p class="MsoNormal"><span lang="EN-GB" style="font-family:Arial;mso-fareast-font-family:
"Times New Roman";color:black;mso-ansi-language:EN-GB">Jacopo</span></p>

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