UDF syntax error

Duc

Hello, I am new at using UDF in Fluent, as a result, I tried create a UDF for unsteady flow, as described in the user manual. For some reason, when I try to interpret the function, it keep coming up with

Line 2: Syntax error

Can anyone suggest what I'm doing wrong? thanks in advance.

Duc ------

#include "udf.h" DEFINE_PROFILE(unsteady_velocity, thread, position)

{ face_t f;

begin_f_loop(f, thread)

{ real t = RP_Get_Real("flow-time"); F_PROFILE(f, thread, position) = 42.41*cos(9424.778*t);

}

end_f_loop(f, thread) }