Hi All,
	I'm trying to use genion to insert 7 Na counter ions into a protein
simulation. I use the following command line.

	genion -s md.tpr -np 7 -pq 1 -o withNa.gro

This works as it should and replaces 7 water molecules with Na. I then fix
the topology file by subtracting 7 from the number of solvent molecules and
add 7 Na molecules. I also add ions.itp. The problem occurs when I try to
run these new .gro and .top files through grompp. I get the error:

Fatal error: No such moleculetype Na

This error seems a little strange since the molecule type Na is define in
ions.itp. Let me know if you can tell what I'm doing wrong. Thanks Alot.
						
Erik Storm