Fatal signal stopped the DPM simulation
 

Hello All,
I Compile my UDF without any error or warning and run the simulations but it stopped the simulations with a fatal signal(Image attached). How can I fix the problem :confused::confused::confused::confused:? Looking for help badly.....
/************************************************** ************************************/
/* UDF for computing cell co-ordinates */
/************************************************** ************************************/

#include "udf.h"
#include "sg.h"
#include "dpm.h"
#define WALL_ID 8

DEFINE_DPM_SCALAR_UPDATE(particle_coords, c, ct, initialize, p)
{
real A[ND_ND];
int n;
face_t f;
Thread *ft;
c_face_loop(c, ct, n)
{
f=C_FACE(c, ct,n);
ft=C_FACE_THREAD(c, ct, n);
if (NNULLP(ft))
{
if (THREAD_ID(ft)== WALL_ID)
{
p->user[0] = p->state.pos[0];
p->user[1] = p->state.pos[1];
p->user[2] = p->state.pos[2];

}
}

}
}

DEFINE_DPM_OUTPUT(Particle_coords_output, header, fp, p, thread, plane)
{
char name[10];
if (header)
{
if (NNULLP(thread))
par_fprintf_head(fp,"(%s %d)\n", thread->head->dpm_summary.sort_file_name,3);
else
par_fprintf_head(fp,"(%s %d)\n", plane->sort_file_name,3);

par_fprintf_head(fp,"(%10s %10s %10s)\n","X", "Y", "Z");
}
else
{
sprintf(name,"%s:%d", p->injection->name,p->part_id);
par_fprintf(fp,"(%10.6g %10.6g %10.6g)\n", p->user[0], p->user[1], p->user[2]);
}
}

Thanks in advance. Looking for your help. My model is 3ddp, serial, laminar flow, My platform windows 7,64 bit, Microsoft visual studio 5, 10 and microsoft windows SDK v7.o.

Saeed

You can find the problem by standard debugging methods. Comment out some of the code, see if you still get an error; if you don't get an error then look more closely at the parts you commented out, otherwise try other parts.

I checked my UDF and if I remove /*if (NNULLP(ft)) line, then it works without any fatal error. It also generate a output file with no data. Maybe there is a memory problem. There is no memory allocated and if
NNULLP is not present runs but do not prints, because it was not stored. How can I solve the problem. I am badly looking for some help.

DEFINE_DPM_SCALAR_UPDATE(particle_coords, c, ct, initialize, p)
{
real A[ND_ND];
int n;
face_t f;
Thread *ft;
c_face_loop(c, ct, n)
/*{*/
ft=C_FACE_THREAD(c, ct, n);
/*if (NNULLP(ft))
{*/
if (THREAD_ID(ft)== WALL_ID)
{
p->user[0] = p->state.pos[0];
p->user[1] = p->state.pos[1];
p->user[2] = p->state.pos[2];

}
/* }

}*/