[urmazda]

hey guys
i have a problem but i am not so sure if it is due to my fluent or udf or other things
i want to find the pressure distribution around an airfoil (which has a sinusoidal motion) in a water tank. i have written the following code in C:

#include "udf.h"
#define om 0.62831853
#define pi 3.1415926
#define scale 0.1612
/*
x(t)= 2c*cos(wt)
alpha(t)= pi/2 + pi/2*sin(wt)
*/
DEFINE_CG_MOTION(vel, omega, time)
{
real b,u;
u = -2*scale*om*sin(om*time);
b = pi/2*om*cos(om*time);
vel[0] = u;
vel[1] = 0.0;
vel[2] = 0.0;
omega[0] = 0.0;
omega[1] = 0.0;
omega[2] = b;
}

but in fluent after building it in udf compiler, in loading time i am recived the following error;

Opening library "code"...
Error: open_udf_library: The system cannot find the file specified.
Error Object: ()

someone please help me
thank you in advance