[gmx-users] do_dssp Segmentation fault

[mshappy1986]

Hi all,
   I am meeting the following error in Gromacs 4.5.5 with do_dssp
   Here is the command
       do_dssp -f md.xtc -s md.tpr -o dssp.xpm  
  give me the following error
   segmentation fault  
  I have downloaded the executable DSSP form http://swift.cmbi.ru.nl/gv/dssp/ and set the environment variable, but do_dssp did not work.
  How can I fix it?
  Thanks a lot