Error code: 126 loading compiled udf library into fluent

Perigee · July 23, 2020, 11:20

I am trying to load a udf library into fluent and consistently get error code 126, I have successfully loaded other udfs into this version of fluent and have attempted to load this library into both fluent 20.0.1 and 18.2 with no success. I have been tried compiling with the default compiler and also with Visual Studio 2019. I have also tried loading fluent without parralel processing enabled. I suspect that this error is due to having tensorflow as an include library, I have linked tensorflow as shown below

Code:

#include "C:\Program Files\ANSYS Inc\v201\fluent\include\tensorflow\c\c_api.h" 
#pragma comment(lib, "C:/Program Files/ANSYS Inc/v201/fluent/lib/tensorflow.lib")

When building my code I get a few warnings but no errors and these dont seem to be what is blocking the loading.

Code:

C:\Program Files\ANSYS Inc\v201\fluent\include\tensorflow\c\c_api.h(935): warning C4190: 'TF_NewWhile' has C-linkage specified, but returns UDT 'TF_WhileParams' which is incompatible with C
C:\Program Files\ANSYS Inc\v201\fluent\include\tensorflow\c\c_api.h(891): note: see declaration of 'TF_WhileParams'
C:\Users\Tom\Desktop\DeepLearningFLUENTsims\PlanarJet1.6_tempslice_files\dp0\FLU-1\Fluent\libudf_vrr\src\StaticLib_VRR2.cpp(71) : warning C4700: uninitialized local variable 'cx_cell' used

If anyone has any ideas on solving the error 126 I would appreciate it

AlexanderZ · July 24, 2020, 01:57

there is a special workflow for linking external (precompiled) libraries to UDF
you may find it in ANsys Fluent Customization manual

Youwu · May 27, 2022, 04:14

Hi，
Have you solved this problem? I'm now facing the same issue when loading an external library. I'm now using Fluent 19.3(2019r1) and VS 2017. I didn't get the error message when compiling the udf, but received error 126 when I tried to load the udf.

ChaoLW · August 25, 2022, 15:15

Hi, Youwu!
Did you find the solution?

Quote:

Originally Posted by Youwu

Hi，
Have you solved this problem? I'm now facing the same issue when loading an external library. I'm now using Fluent 19.3(2019r1) and VS 2017. I didn't get the error message when compiling the udf, but received error 126 when I tried to load the udf.

July 23, 2020, 11:20	Error code: 126 loading compiled udf library into fluent	#1
Perigee New Member Tom Rich Join Date: Feb 2019 Posts: 4 Rep Power: 7	I am trying to load a udf library into fluent and consistently get error code 126, I have successfully loaded other udfs into this version of fluent and have attempted to load this library into both fluent 20.0.1 and 18.2 with no success. I have been tried compiling with the default compiler and also with Visual Studio 2019. I have also tried loading fluent without parralel processing enabled. I suspect that this error is due to having tensorflow as an include library, I have linked tensorflow as shown below Code: #include "C:\Program Files\ANSYS Inc\v201\fluent\include\tensorflow\c\c_api.h" #pragma comment(lib, "C:/Program Files/ANSYS Inc/v201/fluent/lib/tensorflow.lib") When building my code I get a few warnings but no errors and these dont seem to be what is blocking the loading. Code: C:\Program Files\ANSYS Inc\v201\fluent\include\tensorflow\c\c_api.h(935): warning C4190: 'TF_NewWhile' has C-linkage specified, but returns UDT 'TF_WhileParams' which is incompatible with C C:\Program Files\ANSYS Inc\v201\fluent\include\tensorflow\c\c_api.h(891): note: see declaration of 'TF_WhileParams' C:\Users\Tom\Desktop\DeepLearningFLUENTsims\PlanarJet1.6_tempslice_files\dp0\FLU-1\Fluent\libudf_vrr\src\StaticLib_VRR2.cpp(71) : warning C4700: uninitialized local variable 'cx_cell' used If anyone has any ideas on solving the error 126 I would appreciate it

July 24, 2020, 01:57		#2
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	there is a special workflow for linking external (precompiled) libraries to UDF you may find it in ANsys Fluent Customization manual Perigee likes this. __________________ best regards ****************************** press LIKE if this message was helpful

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May 27, 2022, 04:14		#3
Youwu New Member You Wu Join Date: Nov 2018 Posts: 16 Rep Power: 8	Hi， Have you solved this problem? I'm now facing the same issue when loading an external library. I'm now using Fluent 19.3(2019r1) and VS 2017. I didn't get the error message when compiling the udf, but received error 126 when I tried to load the udf.