EDEM-Fluent Coupling Error

Jon_21392 · September 2021

Hi,

I am having issues with the EDEM-Fluent coupling; when I read the journal file in Fluent I get the error: Error at host: Error code 126.

I am using EDEM 2021.0 and Fluent 2021 R1 with version 2.3.1 of the coupling.

I have tried the coupling on multiple computers with multiple versions of EDEM/Fluent (compiling for each combination) and get the same error on all but one that is running EDEM 2021.0 and Fluent 2020 R2.

Any ideas on how to fix this would be much appreciated.

Thanks.

jerrinjobs · April 11

Hi Tony

Please try running Fluent as an admin, and that could resolve the issue.

Thanks,
Jerrin Job

Richard Wood_20774 · September 2021

Hi Jon,

The Fluent coupling is version specific. You will need to compile the UDF library for each EDEM-Fluent pairing. It sounds like you have compiled it successfully for EDEM 2021.0 and Fluent 2020.2, but that is the only pairing for which that UDF will work. If you repeat the steps for compilation for EDEM 2021.0 and Fluent 2021 R1, then you should be able to load the library.

EDEM 2021.2 is due for release shortly and I'll be uploading a newer version of this compiler shortly. However, for now I would stick with Fluent 2021 R1 if you intend to couple with EDEM, as I had issues during testing when coupling with Fluent 2021 R2 (Ansys are looking into it).

Cheers,

Richard

Jon_21392 · September 2021

Hi Richard,

Thanks for the reply.

I know that it is version specific and I have been compiling for each specific version on the specific computer being used which is what I meant by saying compiling for each combination.

Is there any other reasons that you think could be causing this?

Cheers,

Jon

Richard Wood_20774 · September 2021

None that I can think of. I've only ever seen the error 126 when loading in the wrong coupling version.

Since the coupling folder names will be the same (lib_udf_coupling) and it can be easy to confuse which is which, if you go to:

lib_edem_coupling\win64\<any folder>\makefile

somewhere around line 50 of that file you will see the Fluent version that the dll is compiled for. Might be worth checking you're definitely loading the correct version.

Richard

Jon_21392 · September 2021

Thanks Richard, that is a great tip.

I can confirm it is compiled for the correct version:

I will keep trying and see if I can figure it.

Cheers,

Jon

Richard Wood_20774 · September 2021

The only other thing that springs to mind, are you setting the Fluent working directory to where the correct UDF library is?

Richard

Jon_21392 · September 2021

Yes, everything is in the same working directory.

Richard Wood_20774 · September 2021

If your EDEM and Fluent install paths are the default ones, you can attach your lib_edem_coupling folder here and I can see if I can load it correctly at my end. That'll at least rule out whether it's the dll that's the issue or if it's pathing related with Fluent.

Richard

Lv Longfei · October 2021

I think you should add the installation path of edem to the environment variable, path =.. /.. / lib/ bin

Richard Wood_20774 · October 2021

Ah yes, I'm forgetting about the change with the Altair installers. We no longer add the /bin and /lib folders to the system path by default anymore. As Lv mentions above, you need to add your versions of the following:

C:\Program Files\Altair\2021.2\EDEM2021.2\bin
C:\Program Files\Altair\2021.2\EDEM2021.2\lib

to your system path.

Richard

Jon_21392 · October 2021

Thanks Lv Longfei and Richard, that has fixed the problem.

Cheers,
Jon

Jani-Petteri Jylhä · November 2021

Richard Wood_20774 said:
Hi Jon,

The Fluent coupling is version specific. You will need to compile the UDF library for each EDEM-Fluent pairing. It sounds like you have compiled it successfully for EDEM 2021.0 and Fluent 2020.2, but that is the only pairing for which that UDF will work. If you repeat the steps for compilation for EDEM 2021.0 and Fluent 2021 R1, then you should be able to load the library.

EDEM 2021.2 is due for release shortly and I'll be uploading a newer version of this compiler shortly. However, for now I would stick with Fluent 2021 R1 if you intend to couple with EDEM, as I had issues during testing when coupling with Fluent 2021 R2 (Ansys are looking into it).

Cheers,

Richard

Hi,

What is the current situation with Fluent 2021 R2 and the coupling?

I have already updated both software and compiled a new coupling. I got the same error code and found this thread. I checked that it was compiled to the right version and added the environment variables to path before trying again. Still got the error. Is there any other workaround besides downgrading Fluent?

BR,

Jani

Richard Wood_20774 · November 2021

Jani-Petteri Jylhä said:
Hi,

What is the current situation with Fluent 2021 R2 and the coupling?

I have already updated both software and compiled a new coupling. I got the same error code and found this thread. I checked that it was compiled to the right version and added the environment variables to path before trying again. Still got the error. Is there any other workaround besides downgrading Fluent?

BR,

Jani

Hi Jani,

I have an updated build from Ansys but I haven't tested it yet and so it's not ready to be uploaded.

I don't currently have access to Fluent (short term issue) but I thought the issue with Fluent 2021 R2 was a different issue to that listed here. The error 126 usually relates to the path of the EDEM \lib folder or compiling the wrong version (as noted in the other comments).

Unfortunately, until I've had chance to take a look at this latest version and update the compiler, the only option is to roll back to an earlier Fluent version.

Cheers,

Richard

Nainul Mishra_22130 · March 2023

Thank you providing the solutions. It is accurate and very helpful.

satri · November 2023

Hey I keep getting this error when i try this, i have included those environment variables to the path as well. I went to src file and took all the udfs of ansys

\AltairEDEM\biDirCoupling\EDEM_Fluent_e-learning\EDEM_Fluent_e-learning\lib_edem_coupling\win64\3ddp_host

and compiled then too but it does not work i keep getting error of this model not compiled for parallel use. I don't know how to proceed. can someone please suggest me a way to move forward?

Tony Arthur · February 15

hello please,

i keep getting this error (

unbound variable

Error Object: %edem-is-connected?)

and I have applied all the fixes in the earlier comments but it does not work for me.

Richard Wood_20774 · February 16

Tony Arthur said:
hello please,

i keep getting this error (

unbound variable

Error Object: %edem-is-connected?)

and I have applied all the fixes in the earlier comments but it does not work for me.

What versions of EDEM & Fluent are you using? And what version of the coupling?

Tony Arthur · February 16

Richard Wood_20774 said:
What versions of EDEM & Fluent are you using? And what version of the coupling?

I am using Ansys 2023R1 and EDEM 2023.1

I am using the latest coupling compiler

jerrinjobs · April 11

Hi Tony

Please try running Fluent as an admin, and that could resolve the issue.

Thanks,
Jerrin Job

Okapi · May 5

Hello,

I am trying to couple Edem 2022.1 and Fluent 2023. But I am still getting the following error message after the compilation. What can be the cause of this error? When changing to Edem 2023.1 the same error message appear:

**********************************************************************
** Visual Studio 2022 Developer Command Prompt v17.9.6
** Copyright (c) 2022 Microsoft Corporation
**********************************************************************
[vcvarsall.bat] Environment initialized for: 'x64'
Microsoft (R) C/C++ Optimizing Compiler Version 19.39.33523 for x64
Copyright (C) Microsoft Corporation. All rights reserved.

AdaptorInterface.cpp
Microsoft (R) C/C++ Optimizing Compiler Version 19.39.33523 for x64
Copyright (C) Microsoft Corporation. All rights reserved.

CAdaptorQuaternion.cpp
Microsoft (R) C/C++ Optimizing Compiler Version 19.39.33523 for x64
Copyright (C) Microsoft Corporation. All rights reserved.

CCellAndThreadData.cpp
Microsoft (R) C/C++ Optimizing Compiler Version 19.39.33523 for x64
Copyright (C) Microsoft Corporation. All rights reserved.

CFluentParticleData.cpp
Microsoft (R) C/C++ Optimizing Compiler Version 19.39.33523 for x64
Copyright (C) Microsoft Corporation. All rights reserved.

CParticleData.cpp

=================
Error Detected
=================

C:\Program Files\ANSYS Inc\v231\fluent\fluent23.1.0\src\main\config.h(122): error C2143: syntax error: missing '{' before ':'

C:\Program Files\ANSYS Inc\v231\fluent\fluent23.1.0\src\main\config.h(122): error C2059: syntax error: ':'

C:\Program Files\ANSYS Inc\v231\fluent\fluent23.1.0\cortex\src\dll.h(87): error C2061: syntax error: identifier 'CX_DLL_GetProc'

C:\Program Files\ANSYS Inc\v231\fluent\fluent23.1.0\cortex\src\dll.h(87): error C2059: syntax error: ';'

C:\Program Files\ANSYS Inc\v231\fluent\fluent23.1.0\cortex\src\dll.h(87): error C2059: syntax error: '<parameter-list>'

..\..\src\edem_coupling.c(1486): error C2198: 'Reset_Sampled_Distributions': too few arguments for call

..\..\src\edem_coupling.c(1505): error C2198: 'Average_Distributions': too few arguments for call

..\..\src\edem_coupling.c(1506): error C2198: 'Cleanup_Node_Averages': too few arguments for call

..\..\src\compute_particle_heat_flux.c(49): error C2065: 'RANZ_MARSHALL': undeclared identifier