Hi all I'm trying to compile a udf with my problem. when i copmile it, i get some errores from the fluent. one of this errores is "illegal use of this type as an expression". i don,t know why i get this error. some part of my udf is as follow: DEFINE_EXECUTE_AT_END(main_part) {

...

face_t f;

cell_t c0;

Domain *domain;

domain = Get_Domain(1); ----> Thread *t = Lookup_Thread(domain, ID);

Thread *t0 = t -> t0;

... the error is for the line that has ---->.

Thanks for your help.

You havnt defined ID.

thank you for your reply, i have defined it, but i didn't show it on my message. i have set it from the boudary condition panel.

This should work:


Domain *domain;
Thread *t;
Thread *t0;
face_t f;
cell_t c0;

domain = Get_Domain(1);
t = Lookup_Thread(domain, ID);

t0 = t -> t0;

thank you joe for your replies. i examined your suggestion and it worked correctly. but i have faced with a new problem in my code. i try to dot product two vectores but it not work. this part of my code is:

... c0 = F_C0(f, t); F_AREA(A, f, t); deltemp = C_T_G(c0,t0); Qin = - 1.2 * ND_DOT(deltemp, A) / NV_MAG(A); ...

this error is at the final line of the\is code. and error is "not enough actual parameters for macro 'ND_DOT'".