> Dear users:
> When I am using Lammps,I find that the max number of groups LAMMPS
> assign is 32,Can I make this number larger?
you can answer this question yourself.
have a look at the file src/group.cpp
you'll find a line:
#define MAX_GROUP 32
you have three guesses what happens if you
change the 32 to something else and recompile...
I don't think this will work; on a 32 bit machine, this number should never exceed 32.