I wrote my udf forms and successfully compiled in fluent, but I received this error message. I don't konw exactly what to say. Frankly speaking, I don't have a concept of writing udf forms and distinguish function returns type void and real. so can anybody help me!! plz (udf.cchip-exec: cathode_source: wrong return type: void udf function expected)

DEFINE_SOURCE(cathode_source, cell, thread, dS, eqn)

{

real x[ND_ND];

real source, t1;

Thread *t;

face_t f;

cell_t c;

C_T(c,t);

C_CENTROID(x, c, thread);

t1=C_T(F_C1(f,t), t);

source=fabs(Jc)*5*kb*(t1-temp_a)/(2*e);

dS[eqn]=0.0;

}

try this

DEFINE_SOURCE(cathode_source, cell, thread, dS, eqn)

{

real x[ND_ND];

real source, t1;

Thread *t;

face_t f;

cell_t c;

C_T(c,t);

C_CENTROID(x, c, thread);

t1=C_T(F_C1(f,t), t);

source=fabs(Jc)*5*kb*(t1-temp_a)/(2*e);

dS[eqn]=0.0;

return source; /* missing */ }

question : you have not declared Jc, kb, temp_a, e, maybe declared in global constant!

i'm sorry, it's not the solution for you!! i just read the message before (friday)... sorry, this prog seems to be correct...

thank for your concern....

I don;t konw how to wirte.. plz... anyboby help me