[gmx-users] Syntax error -File dppc.itp line 1

[Poncho Arvayo Zatarain]

Hello,
 im doing a DPPC simulation and when i use grompp to generate tpr file 
this appears: Fatal error: Syntax error -File dppc.itp, line 1. Last 
line read: '[moleculetype]' Invalid order for directive moleculetype. 
What can i do? My dppc.itp includes

[ moleculetype ]
; Name   nrexcl
DPPC     3

[ atoms ], [ pairs ], [ dihedrals ]

#ifdef POSRES_LIPID
#include "lipid_posre.itp"
#endif

And my topology file is: 

; Include chain topologies
#include "dppc.itp"
#include "ffG53a6.itp"
#include "dppc_53a6.itp"

; Include water topology
#include "spc.itp"

; Include ion topologies
#include "gromos53a6_lipid.ff/ions.itp"

; System specifications
[ system ]
DPPC Bilayer, 

[ molecules ]
; molecule name nr.
DPPC 128
SOL 3655