fix wall/srd command

If it is possible for you, please say me what kind of interaction is taken into account between srd particles and hypothetical srd wall in fix wall/srd command?
perhaps it could help me. because if i make a thick wall that composed of several rows of particles and i need to set an interation between srd particles and wall’s particles so that thay can do interact togther and srd particles cannt move thru thick wall.

I've explained this several times. Make a wall of overlapping big particles,
but not so many overlaps that there are more than 30 per SRD bin.
If you insist on that many overlaps, then edit this line in fix_srd,cpp
to something larger:

#define ATOMPERBIN 30