[lammps-users] about lattice

hi everyone:
when I use command lattice, I write :
lattice user 2.972 a1 1.0 0.0 0.0 a2 0.5 1.0 0.0 a3 0.0 0.0 0.5 basis 0.0 0.0 0.0
is it wrong?why ERROR: Illegal lattice command

regards,
zheng

Replace "user" with "custom". The current
version uses custom to be consistent with other "custom"
commands.

Steve