source leaprc.ff03
loadamberparams water.frcmod
mol = copy WAT
set mol.1 name MOL
savepdb mol water.pdb
solvateoct mol TIP3PBOX 15.0
savepdb mol WAT_TIP3P.pdb
saveamberparm mol WAT_TIP3P.prmtop WAT_TIP3P.inpcrd
set mol.1.1 charge 0.00
set mol.1.2 charge 0.00
set mol.1.3 charge 0.00
saveamberparm mol WAT_TIP3P_nocharge.prmtop WAT_TIP3P_nocharge.inpcrd
set mol.1.1 type DO
set mol.1.2 type DH
set mol.1.3 type DH
saveamberparm mol WAT_TIP3P_nothing.prmtop WAT_TIP3P_nothing.inpcrd
quit