need help regarding surface reaction UDF
 

Hi all,

I have been writing a UDF for multiple surface reactions on the lines of 4.3.16. When I interpret this UDf, it gives me error "structure reference not implemented" on lines

(1) Thread *t0=t->t0;

(2) if (STREQ(r->name, "reaction-1"))

*rr = ky*(p/pt -h20) + 4690*ky*(T_w - T_b)/(T_b*T_b);

I am using fluent 6.2.16

I would be most grateful for any advice.