Sub SHOOTF(NVAR, V1(), V2(), DELV1(), DELV2(), N1, N2, X1, X2, XF, EPS, H1, HMIN, F(), DV1(), DV2())
    Dim Y(20), F1(20), F2(20), DFDV(20, 20), INDX(20), XP(200), YP(10, 200)
    Call LOAD1(X1, V1(), Y())
    Call ODEINT(Y(), NVAR, X1, XF, EPS, H1, HMIN, NOK, NBAD, XP(), YP())
    Call SCORE(XF, Y(), F1())
    Call LOAD2(X2, V2(), Y())
    Call ODEINT(Y(), NVAR, X2, XF, EPS, H1, HMIN, NOK, NBAD, XP(), YP())
    Call SCORE(XF, Y(), F2())
    J = 0
    For IV = 1 To N2
        J = J + 1
        SAV = V1(IV)
        V1(IV) = V1(IV) + DELV1(IV)
        Call LOAD1(X1, V1(), Y())
        Call ODEINT(Y(), NVAR, X1, XF, EPS, H1, HMIN, NOK, NBAD, XP(), YP())
        Call SCORE(XF, Y(), F())
        For I = 1 To NVAR
            DFDV(I, J) = (F(I) - F1(I)) / DELV1(IV)
        Next I
        V1(IV) = SAV
    Next IV
    For IV = 1 To N1
        J = J + 1
        SAV = V2(IV)
        V2(IV) = V2(IV) + DELV2(IV)
        Call LOAD2(X2, V2(), Y())
        Call ODEINT(Y(), NVAR, X2, XF, EPS, H1, HMIN, NOK, NBAD, XP(), YP())
        Call SCORE(XF, Y(), F())
        For I = 1 To NVAR
            DFDV(I, J) = (F2(I) - F(I)) / DELV2(IV)
        Next I
        V2(IV) = SAV
    Next IV
    For I = 1 To NVAR
        F(I) = F1(I) - F2(I)
        F1(I) = -F(I)
    Next I
    Call LUDCMP(DFDV(), NVAR, INDX(), DET)
    Call LUBKSB(DFDV(), NVAR, INDX(), F1())
    J = 0
    For IV = 1 To N2
        J = J + 1
        V1(IV) = V1(IV) + F1(J)
        DV1(IV) = F1(J)
    Next IV
    For IV = 1 To N1
        J = J + 1
        V2(IV) = V2(IV) + F1(J)
        DV2(IV) = F1(J)
    Next IV
    Erase INDX, DFDV, F2, F1, Y
End Sub