[NPs]

Hi i generate a Wall Heat Generation Rate Profile by this UDF

#include "udf.h"

#define mu_0 = 1,25*10^(-6);
#define chi_2 = 1,25 ;
#define frequency = 344000 ;
#define magnetic_field_quadrato = 21000 ;
#define mass_NPs = 1,5*10^(-3) ;
#define cp_NPs = 0,67 ;
#define mass_water = 498.5*10^(-3) ;
#define cp_water = 4.18 ;

DEFINE_PROFILE(wallheatgenerate,thread,i)
{
face_t f;

real t = CURRENT_TIME ;
17 real delta_T = ((mu_0 * 3,14 * chi_2 * frequency * magnetic_field_quadrato)/((mass_NPs * cp_NPs)+(cp_water * mass_water))) * t;
real source = ((mass_NPs)*(cp_NPs))+(cp_water)*(mass_water))* delta_T;
face_t f;


begin_f_loop(f,thread)
F_PROFILE(f,thread,i) = source;
end_f_loop(f,thread)
}
I got this error : "line 17 parse error" "line 17: invalid type for pointer dereference: int.
I can't understand why. Somebody can help me please?