[gmx-users] trjconv t0/timestep parameter confusion

[Martin Hoefling]

Hey Folks,

I am having trouble with the t0 parameter in conjunction with -b. What  
I am trying to obtain is the following: Trajectory starts at 0 ends at  
110000. From this trajectory, I wanna write out frames from 10000 to  
110000 (so discard the first 10000) and set starting time to 0 so that  
I get a trajectory from 0 to 100000.

What I tried is the following: trjconv -f in.xtc -b 10000 -t0 0 -o out.xtc

This leads to a never ending trjconv process writing out a trajectory  
with frames and a deltat of 0.

Did I misunderstood the parameters somehow? Tested with 4.0.7 and 4.5,  
time units are ps and trajectories have 1ps sampling.

Best wishes

         Martin

BTW:

The workaround for this problem:

First writing -b into a temp trajectory and then treating the tmp  
trajectory with -t0 0