[achint]

I am interpreting an ADJUST macro as well as two Source macros. I have identified that I get segmentation errors while using C_UDMI and C_UDSI (though they are both already defined in the case using GUI). For example, in lines 17 and 18 of the below code. Can someone ID the problem?

DEFINE_ADJUST (moisture_update, d)
{
    real n_ts, m, time, dmdt, Tabs, RH, mr, t_hour, Psat, time_step, k, n, power, a, b, EMC, Mnew, w, Pvs, E_evp;
    Thread *t;
    cell_t c;
      n_ts = RP_Get_Integer ("time-step");
      time_step=RP_Get_Real("physical-time-step");
      time=RP_Get_Real("flow-time");
      t_hour=time/3600;
      if(last_timestep !=n_ts)
      {
        last_timestep=n_ts;
        thread_loop_c(t,d)
        {
        begin_c_loop(c,t)
            {
             m=C_UDMI(c,t,0);
             w=C_UDSI(c,t,0);
            Tabs=C_T(c,t);
            Pvs=0.1 * exp(27.014-(6887/Tabs)-(5.31*log(Tabs/273.16)));
            RH=(101.3 * w)/(Pvs*(0.62189 + w));
            if(RH>0.99)
            {RH=0.99;}
            C_UDMI(c,t,1)=RH;
            dmdt=100.0;
            Mnew=(time_step*dmdt)+m;
            C_UDMI(c,t,0)=Mnew;
            C_UDMI(c,t,2)=dmdt;
            }
        end_c_loop(c,t)
        }
      }
}