THREAD_STORE: undeclared variable
 

Hi,

I get this error message

THREAD_STORE: undeclared variable

when interpreting this UDF

#include "udf.h"

DEFINE_ADJUST(species2, d){

FILE *pf;
Thread *thread;
face_t f, f_shadow;
cell_t c0, c1;
Thread *t0, *t1;
real mass1, mass2, mass3, mass4;
int ID1, ID2, cont;


pf = fopen("masas_especies.txt", "wb");

ID1 = 17;
thread = Lookup_Thread(d, ID1);

cont = 0;

begin_f_loop(f, thread){
c0 = F_C0(f, thread);
t0 = F_C0_THREAD(f, thread);

mass1 = C_YI(c0, t0, 0);
mass2 = C_YI(c0, t0, 1);
mass3 = C_YI(c0, t0, 2);
mass4 = C_YI(c0, t0, 3);
fprintf(pf, "%04d Masas naoh = %g naso4h = %g na2so4h = %g agua = %g\n", cont, mass1, mass2, mass3, mass4);
cont = cont + 1;
}
end_f_loop(f, thread)
fclose(pf);
}

The line of the error is
t0 = F_C0_THREAD(f, thread);

and I do not see what is wrong. Compiling does not work either.

Any ideas? Thanks.