[SNeCu]

I am new to UDF. I want to write an UDF to solve the mass flux at inlet, but there is an error when compiling:
The UDF library you are trying to load is not compiled for 2d on the current platform(win64).
I do not know how can I revise the code?
#include "udf.h"
#define rvol1_ID 5 //inlet ID
DEFINE_EXECUTE_AT_END(mfinlet)
{
real massflux=0;
Domain *d;
Thread *thread, *t0, *t1;
cell_t c0, c1;
face_t f;
real NV_VEC(psi_vec), NV_VEC(A);
d= Get_Domain(1); /* returns fluid domain pointer*/
thread=Lookup_Thread(d, rvol1_ID);
begin_f_loop(f,thread)
{
t0=THREAD_T0(f,thread); c0=F_C0(f,thread);
NV_D(psi_vec,=,C_U(c0,t0),C_V(c0,t0));
F_AREA(A,f,thread);
massflux+=NV_DOT(psi_vec,A);
}
end_f_loop(f,thread)
massflux*=1.225;
}

[`e`]

Ensure your workflow is correct by checking my compiling process for Fluent UDFs with an existing library loaded.

[SNeCu]

Hi, 'e', many thanks for your suggestion. I have followed your step, however, it still doesn't work.
In addition, I found errors when I build the library:
..\..\src\mfinlet.c(5) : error C2018: unknown character '0x7f'
..\..\src\mfinlet.c(12) : error C2018: unknown character '0x7f'
..\..\src\mfinlet.c(15) : warning C4002: too many actual parameters for macro 'THREAD_T0'
..\..\src\mfinlet.c(15) : error C2223: left of '->t0' must point to struct/union
..\..\src\mfinlet.c(16) : warning C4003: not enough actual parameters for macro 'NV_D'
So I think there must be something wrong with my code itself.
Thank you again.

[SNeCu]

It works after some revises:
#include "udf.h"
#define rvol1_ID 15 //face ID
DEFINE_EXECUTE_AT_END(mfinlet)
{
FILE *fp1;
real massflux=0.0;
real time1=CURRENT_TIME;
Domain *d;
Thread *thread, *t0, *t1;
cell_t c0, c1;
face_t f;
real psi_vec[ND_ND],A[ND_ND];
d= Get_Domain(1); /* returns fluid domain pointer*/
thread=Lookup_Thread(d, rvol1_ID);
begin_f_loop(f,thread)
{
t0=THREAD_T0(thread); c0=F_C0(f,thread);
NV_D(psi_vec,=,C_U(c0,t0),C_V(c0,t0));
F_AREA(A,f,thread);
massflux+=NV_DOT(psi_vec,A);
}
end_f_loop(f,thread)
massflux*=1.225;
fp1=fopen("ab_MF.txt","a";
fprintf(fp1,"%g %g\n",time1,massflux);
fclose(fp1);

}

[`e`]

Copying your UDF to a text editor showed an extra (invalid) character on lines 5 and 12 as indicated with your error messages. The other three errors are self-explanatory. It's good to hear the UDF is working now.

[SNeCu]

Thank you very much.