[gmx-users] No velocities found

[bmbbl at leeds.ac.uk]

Dear all,

After the equilibrium simulation on the system, there were several molecules
need to be removed from the conformation. So I convert .gro to .pdb and delete
them from the .pdb file. And pasted the correponding velocities of the rest of
atoms to then new .pdb file. However, when I tried to convert the new.pdb file
back to .gro, editconf gives " No velocities found "

What could the problem be?

Thanks.

Binbin