Hi I am in MD simulation step and use of command: grompp -f md.mdp -c npt.gro -t npt.cpt -p topol.top -o md_0_1.tprmdrun -deffnmmd_0_1 (500000 step-1000.0 ps) but in runing,program stop and give a error: File input/output error: Cannot write trajectory frame; maybe you are out of quota? please guide me.