Dear gmx users and martini experts,

I would like to simulate a membrane system with two walls using a coarse-grained model using gromacs v.5.1. I receive the core dumping faults. I used related mdp options as follows

nwall = 2 ; wall at z=0 and z=z-box

wall-type = 12-6 ; direct 12-6 LJ as fn of distance from wall

wall-atomtype = C1 C1

wall-density = 120 120

wall-r-linpot = 0 0

ewald-geometry = 3dc ; Only Ewald sum compatible with slab geometry,$

wall-ewald-zfac = 3

comm-mode = none

refcoord_scaling = all

Pcoupl = berendsen

Pcoupltype = semiisotropic

tau_p = 5.0

compressibility = 3e-4 0

ref_p = 1.0 1.0

Please suggest me some options such as wall-atomtype, density etc.

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