[lilistar-8216]

Hi, I'd like to get mass fraction data and store UDM at the end of tilmestep.
I tried calculation with UDF that can execute value at the end of tilmestep but it doesn't work and i get segmentation error.

My UDF is here,

#include "udf.h"
#include "sg_pdf.h"
#include "pdf_props.h"

DEFINE_EXECUTE_AT_END(mass_fraction)
{
Domain *d;
Thread *t;
cell_t c;
d = Get_Domain(1);
real mass;

thread_loop_c(t,d)
{
begin_c_loop(c, t)
{
mass = Pdf_Yi(c, t, 54); /*54 is an index of species i want to get value */
C_UDMI(c, t, 0) = mass;
Message("mf = %g\n", mass);
}
end_c_loop(c,t)
}
}

my calculation model has both solid zone and fluid zone. Addition to that, I use an Chemkin as a species model.

I also tried to change Pdf_Yi(cat,54) into C_YI(c,t,54) but it also didn't work.

Do you know if there are some problems in my UDF or not, how to use C_YI or Pdf_Yi macros, or the other ways to get mass fraction value at the end of tilmestep without these macros.

regards