[gmx-users] how to create a .top file from a .gro?

[Aline]

Hi list,

I want to create a .top form an already run dinamics, using the .gro
result from the last trajetory frame. I already used the pdb2gmx, but
when i run the grompp, using the already cited .gro and new .top, i
receive the error that my .gro and .top doesnt have the same number of
atoms.
is there something im missing?

thanks for advices