[gush]

hi everyone!

i receive an error while trying to execute a udf, the error message is:
"Error: received a fatal signal (Segmentation fault).
Error Object: #f"

my case is very simple, i would like to get the volume of the cells and flow rate of the particles for now. if i can accomplish it i will change it with more complex problems.

i can compile the udf and load it without any problem. in the problem, i do not interact the continuos phase with the discrete phase(one way coupling) because discrete phase has no affect on the continuous phase. so i can display the particle tracks via Results>Graphics and animations>Particle Tracks>Set up.

i am not experienced on UDF issue and coding. maybe it is very simple but i could not get any proper answer from the forum or from other code examples.

here is the code:
#include "udf.h"
#include "dpm.h"

DEFINE_ON_DEMAND(PSIC)
{
Domain *d;
Thread *t;
cell_t c;
Tracked_Particle *p;

real flowrate;
real volume;

d = Get_Domain(1);
thread_loop_c(t,d)
{
begin_c_loop(c,t)
{
volume = C_VOLUME(c,t); /* get cell volume */
flowrate = P_FLOW_RATE(p); /* get flow rate */
C_UDMI(c,t,0) = flowrate/volume;
}
end_c_loop(c,t)
}
}