Zero interaction energy from mdrun -rerun in GMX 2020 vs non zero energies in GMX 2018

Hi Fabian
Thank you for your reply. I have applied to join the developers mailing list to see if I can help with this problem. Gromacs is a spectacular set of programs, so I’d love to squash what appears to be a real bug :) I’ll let you know if I make any headway.

Best Wishes
Guy Vigers