[h.iraji]

Hi
I have been a udf as follow:

#include "udf.h"
#include "mem.h"
DEFINE_GEOM(deforming,domain,dt,position)
{
cell_t c;
Thread *t;
real *position;
begin_c_loop_all(c,t)
{
position=0.2601*exp(-6.147e-05*C_P(c,t)) + 0.5091*exp(-0.0007079*C_P(c,t));
}
end_c_loop_all(c,t)
return;
}

After trying to interpret it, error reports was seen as follow:
Error: line 10: invalid type for pointer dereference: float.
How eliminate these error?
Anyhelp would be appreciated.