[Harry321]

Hi I try to write a macro to loop over faces of certain cell, to check mass flux over there. I found out that there is a macro to loop over a faces in the cell. I try to use it and every time a get an error "Segmentation fault". and Error Object:#f. Could anybody help my with this UDF?
DEFINE_ADJUST(voidf, super_domain)
{
FILE *fp;
fp = fopen("data.txt", "a");
Thread *t;
cell_t c;
face_t f;

thread_loop_c(t, super_domain)
{
begin_c_loop_int(c, t)
{
c_face_loop(c, t, i)
{
f = C_FACE(c, t, i);
massflow += F_FLUX(f, t);
fprintf(fp, "masflow: %f \n", massflow);
}
massflow = 0.0;
fprintf(fp, "\n\n");

}
end_c_loop_int(c, t)
}
fclose(fp);
}

[Harry321]

I should mentioned, in previous post, that I work with several phases. And glad to inform I found the solution to the problem