[Moorriiss]

Hello friends,

I wrote a UDF for a Velocity sidewall unsteady B.C in jet impingement in this way:


#include "udf.h"
DEFINE_PROFILE(unsteady_velocity, t, position)
{
face_t f;
real physical_dt, dudt, u, u_old;
physical_dt = RP_Get_Real("physical-time-step");
begin_f_loop(f, t)
{
u = C_U(f,t);
u_old = C_U_M1(f,t);
dudt= (u-u_old)/physical_dt;/*explicit part*/
F_PROFILE(f, t, position) = -dudt/C_DUDX(f,t);
}
end_f_loop(f, t)
}

and in compiling the UDF, I did not face any error, however when I want to initialize the problem, an error appears in this way:

Error:
FLUENT received fatal signal (ACCESS_VIOLATION)
1. Note exact events leading to error.
2. Save case/data under new name.
3. Exit program and restart to continue.
4. Report error to your distributor.
Error Object: #f

What is wrong with my UDF? If there is any solution, please make me aware. I appreciate any help.

regards