Hello everybody I have been using GROMACS 2018.1 in the last month and I got an error "core dumped" while running the simulation. Accordingly, I have installed the 2020.1 version and while I am doing pressure equilibration (npt), I had the same error again (I paste it below) which is core dumped. Is it a problem in this version or I might have done something wrong while running the equilibration ? I would really appreciate it, if anyone can guide me. I have pasted the error below Thanks Mohamed                   :-) GROMACS - gmx mdrun, 2020.1 (-:                             GROMACS is written by:      Emile Apol      Rossen Apostolov      Paul Bauer     Herman J.C. Berendsen     Par Bjelkmar      Christian Blau   Viacheslav Bolnykh     Kevin Boyd      Aldert van Buuren   Rudi van Drunen     Anton Feenstra       Alan Gray       Gerrit Groenhof     Anca Hamuraru    Vincent Hindriksen  M. Eric Irrgang     Aleksei Iupinov   Christoph Junghans     Joe Jordan     Dimitrios Karkoulis     Peter Kasson        Jiri Kraus      Carsten Kutzner      Per Larsson       Justin A. Lemkul    Viveca Lindahl    Magnus Lundborg     Erik Marklund       Pascal Merz     Pieter Meulenhoff    Teemu Murtola       Szilard Pall       Sander Pronk      Roland Schulz      Michael Shirts    Alexey Shvetsov      Alfons Sijbers     Peter Tieleman      Jon Vincent      Teemu Virolainen  Christian Wennberg    Maarten Wolf      Artem Zhmurov                              and the project leaders:         Mark Abraham, Berk Hess, Erik Lindahl, and David van der Spoel

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GROMACS:      gmx mdrun, version 2020.1 Executable:   /home/abdelaal/build2/gromacs-2020.1/build/bin/gmx Data prefix:  /home/abdelaal/build2/gromacs-2020.1 (source tree) Working dir:  /home/abdelaal/Desktop/GROMACS/C60:TAPC/C60_GRM/22 Command line:   gmx mdrun -v -deffnm npt

Reading file npt.tpr, VERSION 2020.1 (single precision) Changing nstlist from 10 to 100, rlist from 1 to 1

Using 1 MPI thread

Non-default thread affinity set, disabling internal thread affinity

Using 8 OpenMP threads

starting mdrun 'GRM in vacuum' 50000 steps,     25.0 ps. step 44700, remaining wall clock time:   137 s           Step 44790  Warning: pressure scaling more than 1%, mu: 1.01937 1.01937 1.01937 Segmentation fault (core dumped)