On 27/03/2012 8:50 PM, Albert wrote:
hello:
  I am trying to run do_dssp by command:

do_dssp -s md.tpr -f md.trr -b 400 -e 500 -o fws_ss.xpm

but it said:

Select a group: 1
Selected 1: 'Protein'
There are 35 residues in your selected group
trn version: GMX_trn_file (single precision)
Reading frame     400 time  400.000
Back Off! I just backed up ddbXn2WY to ./#ddbXn2WY.1#

-------------------------------------------------------
Program do_dssp, VERSION 4.5.5
Source code file: do_dssp.c, line: 572

Fatal error:
Failed to execute command: /usr/local/bin/dssp -na ddbXn2WY ddeWknkk > /dev/null 2> /dev/null For more information and tips for troubleshooting, please check the GROMACS
website at http://www.gromacs.org/Documentation/Errors
-------------------------------------------------------

Sounds like you haven't followed the instructions in do_dssp -h carefully enough.

Mark
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