[MEKSEM]

hy all, i'am traying to compile a UDF who give me the average pressure and temperature of air in compressible tow-phase flow (air-water) liquid piston.

but when i compile my udf, it given to me this error that i never seen before

error LNK2019 : Unresolved external symbol __imp__RP_Get_Float Referenced in the Pressure function

error LNK2019 : Unresolved external symbo __imp__Get_Domain Referenced in the Pressure function



I implore you to help me

i attached my UDF :

[KaLium]

Can you just copy+paste the code to this page?

I don't want to download any unknown files.

[KaLium]

are you using functions such as sin()?

Have you included the #math?

[MEKSEM]

hy, KaLium

Here is my udf

________________________________
#include "udf.h"



DEFINE_EXECUTE_AT_END(Pression)
{

Domain *subdomain;
Domain *mixture_domain;
int phase_domain_index;
cell_t c;
Thread *t;

real sum_p = 0., sum_T = 0., P_moy, T_moy, vol_tot = 0;
FILE* fichier = NULL;

fichier = fopen("data_air.txt", "a");
mixture_domain = Get_Domain(2);
subdomain = Get_Domain(2);

sub_domain_loop(subdomain, mixture_domain, phase_domain_index)
{


thread_loop_c(t,subdomain)
{
begin_c_loop_all(c, t)
{


vol_tot += C_VOLUME(c, t);
sum_p += C_P(c, t);
sum_T += C_T(c, t);

end_c_loop(c, t)
}
}

P_moy = sum_p / vol_tot;
T_moy = sum_T / vol_tot;

C_UDMI(c, t, 0) = P_moy;
C_UDMI(c, t, 1) = T_moy;




printf("P_moy_air: %g\n", P_moy);
printf("P_moy_air: %g\n", T_moy);


if (fichier != NULL)
{
fprintf(fichier, "%g %g\n", CURRENT_TIME, P_moy, T_moy);
fclose(fichier);
}
fflush(stdout);
}
}

[KaLium]

Are you sure that you can use
C_UDMI(c, t, 0) = P_moy;
C_UDMI(c, t, 1) = T_moy;
outside of the cell-loop?

Does you code even need them?

[KaLium]

in fprintf(fichier, "%g %g\n", CURRENT_TIME, P_moy, T_moy); you are defining only 2 variables, but trying to use 3.

[MEKSEM]

thanks for your raplay , i'll tray to remind this.

but i already code the UDMI outside and it's run so good.

for the fprint, the Current_time doesn't need to be defined

i think that the problem Is due to compilation with Visual Studio but i can't see him

[tyehuo]

kalium does not know what he is talking about.
That's not the point at all.
I have also encountered the same problem, not solved yet.

[pakk]

Kalium gave useful feedback. They identified two problems in the code.

There might be more problems remaining, but it's not nice to say such a bad thing about somebody who is helping.

[vivjk94]

The code below is my udf for simulating a gear pump:

for second gear,

#include "udf.h"

DEFINE_CG_MOTION(gear_2_new,dt,vel,omega,time,dtim e)
{


real t = CURRENT_TIME;
NV_S (vel, = , 0.0);
NV_S (omega, = , 0.0);
omega[2] = -60.0;


}

for first gear,

#include "udf.h"

DEFINE_CG_MOTION(gear_1_new,dt,vel,omega,time,dtim e)
{

real t = CURRENT_TIME;
NV_S (vel, = , 0.0);
NV_S (omega, = , 0.0);
omega[2] = 60.0;

}


This is the error message i recieve:
gearone.obj : error LNK2019: unresolved external symbol __imp__RP_Get_Float referenced in function _gear_1_new
geartwo.obj : error LNK2001: unresolved external symbol __imp__RP_Get_Float
C:\PROGRA~1\ANSYSI~1\v192\fluent\fluent19.2.0\mult iport\win64\mpi\shared\mport.lib : warning LNK4272: library machine type 'x64' conflicts with target machine type 'x86'
C:\PROGRA~1\ANSYSI~1\v192\fluent\fluent19.2.0\win6 4\2d_node\fl_mpi1920.lib : warning LNK4272: library machine type 'x64' conflicts with target machine type 'x86'
libudf.dll : fatal error LNK1120: 1 unresolved externals

The weird thing about this is that this udf executed perfectly the previous day and today its throwing me this error. i use fluent 19.2 and Visual studio 2017 .
Need suggestions

[AlexanderZ]

most likely you are using x64 fluent version, but run x86 compiler