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error LNK2019 : Unresolved external symbol

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Old   June 19, 2017, 06:52
Unhappy error LNK2019 : Unresolved external symbol
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MEKSEM HOCINE
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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 :
Attached Files
File Type: c udf.c (968 Bytes, 29 views)
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Old   June 19, 2017, 08:02
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Can you just copy+paste the code to this page?

I don't want to download any unknown files.
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Old   June 19, 2017, 08:05
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are you using functions such as sin()?

Have you included the #math?
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Old   June 19, 2017, 09:12
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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);
}
}
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Old   June 19, 2017, 09:19
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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?
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Old   June 19, 2017, 09:27
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in fprintf(fichier, "%g %g\n", CURRENT_TIME, P_moy, T_moy); you are defining only 2 variables, but trying to use 3.
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Old   June 19, 2017, 09:52
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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
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Old   July 23, 2021, 13:56
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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.
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Old   July 24, 2021, 00:40
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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.
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"The UDF library you are trying to load (libudf) is not compiled for parallel use on the current platform" is NOT the error after compiling. It is the error after loading. To see compiler errors, look at your screen after you click "build".
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Old   September 1, 2021, 10:20
Default did you find the solution for this problem? i have it too.
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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
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Old   September 2, 2021, 04:51
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most likely you are using x64 fluent version, but run x86 compiler
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