I want to run an analysis on the molecular trajectory file of my system (protein with 400 atoms). When I run the analysis script on the PDB file, it stops with an error 'Aborted (core dumped)' The PDB file has 10000 molecular frames and that's why, I think, probably the script is not able to handle such a big file. Can someone please suggest me a way to split the trajectory into smaller trajectories (of smaller time interval). I searched on the gromacs website (trjconv) but I could only find a way to generate the trajectory of any subsystem of the original big system, which is not what I am looking for.