module Potential
!
! Contains parameters and tables of the Lennard-Jones potential
!
double precision :: c1
double precision :: c2
double precision :: LL
double precision :: S
double precision :: B
double precision :: M
double precision :: P
double precision :: R
double precision :: A
double precision :: Rcutoff ! cutoff distance
integer :: TableSize
double precision :: Rmin
double precision :: RsqMin
double precision :: DeltaRsq
double precision :: InvDeltaRsq
double precision, dimension(:), allocatable :: PhiTab, DPhiTab
!phi(r),1/r dphi/dr
end module Potential
Ou seja, ele não reconhece os modules que vem antes do programa principal.
Por favor me ajudem.