[serene6390]

Hi, all, I'm trying to calculate a parameter that needs to loop over faces on the wall. but there's always an error:

received a fatal signal (Segmentation fault)

appears when I interpret my UDF file.

Here's a simplified version of my code:
DEFINE_EXECUTE_AT_END(h_zt)
{

real M1_integ=0; /*integration*/
real A=0.001;

Domain *d;
face_t f;
int ID=8;
Thread *t;
Thread *t0;
cell_t c;
cell_t c0;
d = Get_Domain(1);
t = Lookup_Thread(d,ID);


/* Loop over all faces on wall */

begin_f_loop(f,t)
{

c0 = F_C0(f, t);
t0 = THREAD_T0(t);
F_CENTROID(x,f,t);

y=x[1];


if (y>0 && y<0.02)
{
M1_integ+=A*C_T_G(c0,t0)[0];
}

}
end_f_loop(f,t)

Here's what I did after I have this error:
I blocked all the codes after begin_f_loop till the end, and then run the program, the error is still there.
Only after I blocked the codes after d=Get_Domain(1), the error disappeared.

I'm really confused is there anything wrong with d=Get_Domain(1)?

Any help would be appreciated.
Thanks in advance.

[`e`]

Is the boundary ID of 8 correct? The other thing to check is directly adding in the boundary ID:

Lookup_Thread(d,8)

[jbo214]

Try compiling instead of interpreting. See these posts.

http://www.cfd-online.com/Forums/flu...ion-fault.html


http://www.cfd-online.com/Forums/fluent-udf/179767-segmentation_fault_udf.html

[serene6390]

Originally Posted by jbo214

Try compiling instead of interpreting. See these posts.

http://www.cfd-online.com/Forums/flu...ion-fault.html


http://www.cfd-online.com/Forums/fluent-udf/179767-segmentation_fault_udf.html

Hi, joshua,

Thank you so much for providing these posts for me.

I was trying to compiling my UDF instead of Interpreting after reading these posts.

But I have some problem on compiling my UDF.

The error is: UNC paths are not supported. Defaulting to windows directory. Access is denied.

I've tried searching more information about this error. But I still haven't get it solved. I'm doing serial not parallel. The Fluent Root path is C:\Program Files\ANSYS Inc\v171\fluent, which I think should be correct.

I'm using PC in the lab of my school, which has Microsoft Visual Studio 2012 installed.

I really have no idea what else I could do to compile my UDF successfully.

Thank you so much if you could help me one more time.

[jbo214]

It sounds like you might need admin rights, but I'm not sure.

I would try and talk to your computer lab admin/software focal since this is at your school or if you know any professors or grad students who use UDFs with school computers.