I added a source term to the energy equation, and Fluent shows the following err mesg: CAR: invalid argument [1]: wrong type [not a pair]

Could anyone help me with this ?

Thanks

By the way, the UDF I have is the following: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /* heat exchange source */

# include "udf.h"

DEFINE_SOURCE(GS_engexchg_source,c,t,dS,eqn) {

real source;

source = 4.0*C_K_L(c,t)/0.001*(C_UDSI(c,t,1)-C_T(c,t));

dS[eqn] = -4.0*C_K_L(c,t)/0.001;

return source; }

I think you may hook your UDF in a wrong place or pannel. Tell me some more details, and you can contact with me through Email.