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<div>>I am guessing the issue a bit from the brief title, let me know if
</div><div>>installing the external program required to run dssp as described below
</div><div>>is addressing the issue or if this is something that used to work in
</div><div>>GROMACS 2019 and suddenly stopped working, in which case I would need
</div><div>>quite a bit more information.</div><div>>Dssp in gromacs relies on an external program to run which you can find
</div><div>>here: http://swift.cmbi.ru.nl/gv/dssp , just installing GROMACS does not
</div><div>>suffice.</div><div>Thinks <span style="orphans: 2; white-space: pre-wrap; widows: 2; line-height: 1.6;">Christian!</span></div><div><span style="orphans: 2; white-space: pre-wrap; widows: 2; line-height: 1.6;">I post some information as following:</span></div><div><div style="color: rgb(49, 53, 59); font-family: Verdana, 'Microsoft Yahei', SimSun, sans-serif; line-height: 22.4px;"> This "gmx do_dssp" tool of gmx2020 will report an error "Segmentation fault" and no xpm and xvg file generated. I tesetd 2.0.4 and later version of dssp. The gmx2018 and gmx 2019 can work correctly. </div><div style="color: rgb(49, 53, 59); font-family: Verdana, 'Microsoft Yahei', SimSun, sans-serif; line-height: 22.4px;"> Then I checked gmx_do_dssp.cpp code and found some parts of matrix changed a lot, I think this code may have a problem.</div><div style="color: rgb(49, 53, 59); font-family: Verdana, 'Microsoft Yahei', SimSun, sans-serif; line-height: 22.4px;"> Thanks</div></div><div style="color: rgb(49, 53, 59); font-family: Verdana, 'Microsoft Yahei', SimSun, sans-serif; line-height: 22.4px;"><br></div><div style="color: rgb(49, 53, 59); font-family: Verdana, 'Microsoft Yahei', SimSun, sans-serif; line-height: 22.4px;"> Yujie Liu</div>
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