[gmx-users] error in grompp

[Shine A]

Sir,

    I am studying the dynamics of membrane proteins using KALP-15 in DPPC.
But grompp (before minimization of system_inflated.gro) giving error like
this..
Fatal error:
Atomtype LC3 not found

Actually what changes I should do on the system topology, before grompp?
 I found that atomtype LC3 is found in my dppc.itp file.