--- trunk/OOPSE/libmdtools/calc_LJ_FF.F90	2003/03/21 17:42:12	378
+++ trunk/OOPSE/libmdtools/calc_LJ_FF.F90	2003/04/08 22:38:43	482
@@ -2,12 +2,13 @@
 !! Corresponds to the force field defined in lj_FF.cpp 
 !! @author Charles F. Vardeman II
 !! @author Matthew Meineke
-!! @version $Id: calc_LJ_FF.F90,v 1.1.1.1 2003-03-21 17:42:12 mmeineke Exp $, $Date: 2003-03-21 17:42:12 $, $Name: not supported by cvs2svn $, $Revision: 1.1.1.1 $
+!! @version $Id: calc_LJ_FF.F90,v 1.3 2003-04-08 22:38:43 chuckv Exp $, $Date: 2003-04-08 22:38:43 $, $Name: not supported by cvs2svn $, $Revision: 1.3 $
 
 module lj
   use definitions
   use atype_module
   use vector_class
+  use simulation
 #ifdef IS_MPI
   use mpiSimulation
 #endif
@@ -180,7 +181,7 @@ contains
     integer, intent(in) ::  atom1, atom2
     real( kind = dp ), intent(in) :: rij, r2
     real( kind = dp ) :: pot
-    real( kind = dp ), dimension(:,:) :: f    
+    real( kind = dp ), dimension(3,getNlocal()) :: f    
     real( kind = dp ), intent(in), dimension(3) :: d
     logical, intent(in) :: do_pot, do_stress
 
@@ -218,9 +219,9 @@ contains
        
        dudr = 24.0E0_DP * epsilon * (t6 - 2.0E0_DP*t12) / rij
        
-       drdx = -d(1) / rij
-       drdy = -d(2) / rij
-       drdz = -d(3) / rij
+       drdx = d(1) / rij
+       drdy = d(2) / rij
+       drdz = d(3) / rij
        
        fx = dudr * drdx
        fy = dudr * drdy