i interpret the udf, thats for boundary condition:):), and so easy!i get this error :confused:!!!! can you help me? :o

cpp -I"C:\Fluent6.3.26.Inc\fluent6.3.26/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/cortex/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/client/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/multiport/src" -I. -DUDFCONFIG_H="<udfconfig-host.h>" "D:\saha2\coupled\89.8
11\kaplan-sepBlade.inlet\coarse-meshed\udf-g\design\89-22.5\pen\pressure.outlet.cpp"

error: udf compiler: cannot execute cpp -I"C:\Fluent6.3.26.Inc\fluent6.3.26/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/cortex/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/client/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/multiport/src" -I. -DUDFCONFIG_H="<udfco
fig-host.h>" "D:\saha2\coupled\89.8.11\kaplan-sepBlade.inlet\coarse-meshed\udf-g\design\89-22.5\pen\pressure.outlet.cpp"

cpp -I"C:\Fluent6.3.26.Inc\fluent6.3.26/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/cortex/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/client/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/multiport/src" -I. -DUDFCONFIG_H="<C:/Users/YAS/AppData/Local/Temp/udfconfig
node0.h>" "C:/Users/YAS/AppData/Local/Temp/pressure.outlet.cpp.0.c"

cpp -I"C:\Fluent6.3.26.Inc\fluent6.3.26/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/cortex/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/client/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/multiport/src" -I. -DUDFCONFIG_H="<C:/Users/YAS/AppData/Local/Temp/udfconfig
node1.h>" "C:/Users/YAS/AppData/Local/Temp/pressure.outlet.cpp.1.c"

cpp -I"C:\Fluent6.3.26.Inc\fluent6.3.26/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/cortex/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/client/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/multiport/src" -I. -DUDFCONFIG_H="<C:/Users/YAS/AppData/Local/Temp/udfconfig
node2.h>" "C:/Users/YAS/AppData/Local/Temp/pressure.outlet.cpp.2.c"

cpp -I"C:\Fluent6.3.26.Inc\fluent6.3.26/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/cortex/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/client/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/multiport/src" -I. -DUDFCONFIG_H="<C:/Users/YAS/AppData/Local/Temp/udfconfig
node3.h>" "C:/Users/YAS/AppData/Local/Temp/pressure.outlet.cpp.3.c"

cpp -I"C:\Fluent6.3.26.Inc\fluent6.3.26/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/cortex/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/client/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/multiport/src" -I. -DUDFCONFIG_H="<C:/Users/YAS/AppData/Local/Temp/udfconfig
node4.h>" "C:/Users/YAS/AppData/Local/Temp/pressure.outlet.cpp.4.c"

cpp -I"C:\Fluent6.3.26.Inc\fluent6.3.26/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/cortex/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/client/src" -I"C:\Fluent6.3.26.Inc\fluent6.3.26/multiport/src" -I. -DUDFCONFIG_H="<C:/Users/YAS/AppData/Local/Temp/udfconfig
node5.h>" "C:/Users/YAS/AppData/Local/Temp/pressure.outlet.cpp.5.c"

Can anyone help with a UDF problem
 

When I open a UDF with fluent sometimes it works, I have MS Visual 2008, and open fluent using the command prompt, and using win xp 32bit. And at other times if I copy this UDF to another folder and try and open it again to run another case it crashes and displays this message

'Error: Fluent recieved a fatal signal (segmentation violation).
Error Object: ()'

How can I fix this, I don't understand why it works sometimes only, also most of the time I am recieving this error now.

Dave

hi
 

i m little bit confused in setting up the environment variable..could you please give me the details of environment variables setting...thanks waiting for ur reply...

UDF Compile Issues
 

Good morning,

I am trying to compile a UDF library, here are the steps that I take:

Open Visual Studio 2008 x64 Win64 Command Prompt
load VCVARSALLam64
change directory to my directory
launche either fluent 6.3.26 or fluent 12 in command prompt
load batch, properties, sources and tracer files, then load header and build

then when I load i get following error message:

Opening library "libudf"...
Error: open_udf_library: The system cannot find the file specified.

Error: open_udf_library: The system cannot find the file specified.
Error Object: #f




looking at the building of the UDF library:

(chdir "libudf")()
(chdir "win64\3ddp")()
# Generating ud_io1.h
batch.c
properties.c
sources.c
..\..\src\sources.c(308) : error C2275: 'Domain' : illegal use of this type as an expression
c:\program files\ansys inc\v120\fluent\fluent12.0.16\src\mem.h(591) : see declaration of 'Domain'
..\..\src\sources.c(308) : error C2065: 'd' : undeclared identifier
..\..\src\sources.c(309) : error C2275: 'Thread' : illegal use of this type as an expression
c:\program files\ansys inc\v120\fluent\fluent12.0.16\src\mem.h(691) : see declaration of 'Thread'
..\..\src\sources.c(309) : error C2065: 't' : undeclared identifier
..\..\src\sources.c(310) : error C2275: 'cell_t' : illegal use of this type as an expression
c:\program files\ansys inc\v120\fluent\fluent12.0.16\src\mem.h(186) : see declaration of 'cell_t'
..\..\src\sources.c(310) : error C2146: syntax error : missing ';' before identifier 'c'
..\..\src\sources.c(310) : error C2065: 'c' : undeclared identifier
..\..\src\sources.c(319) : error C2065: 't' : undeclared identifier
..\..\src\sources.c(319) : error C2065: 'd' : undeclared identifier
..\..\src\sources.c(319) : error C2223: left of '->c' must point to struct/union
..\..\src\sources.c(319) : error C2065: 't' : undeclared identifier
..\..\src\sources.c(319) : warning C4047: '!=' : 'void *' differs in levels of indirection from 'int'
..\..\src\sources.c(319) : error C2065: 't' : undeclared identifier
..\..\src\sources.c(319) : error C2065: 't' : undeclared identifier
..\..\src\sources.c(319) : error C2223: left of '->next' must point to struct/union
..\..\src\sources.c(322) : error C2065: 't' : undeclared identifier
..\..\src\sources.c(322) : error C2223: left of '->nelements' must point to struct/union
..\..\src\sources.c(322) : error C2065: 'c' : undeclared identifier
..\..\src\sources.c(322) : error C2065: 'c' : undeclared identifier
..\..\src\sources.c(322) : error C2065: 'c' : undeclared identifier
..\..\src\sources.c(324) : error C2065: 't' : undeclared identifier
..\..\src\sources.c(324) : error C2223: left of '->storage' must point to struct/union
..\..\src\sources.c(324) : error C2065: 'c' : undeclared identifier
..\..\src\sources.c(325) : error C2065: 't' : undeclared identifier
..\..\src\sources.c(325) : error C2223: left of '->storage' must point to struct/union
..\..\src\sources.c(325) : error C2065: 'c' : undeclared identifier
..\..\src\sources.c(326) : error C2065: 't' : undeclared identifier
..\..\src\sources.c(326) : error C2223: left of '->storage' must point to struct/union
..\..\src\sources.c(326) : error C2065: 'c' : undeclared identifier
..\..\src\sources.c(327) : error C2065: 't' : undeclared identifier
..\..\src\sources.c(327) : error C2223: left of '->storage' must point to struct/union
..\..\src\sources.c(327) : error C2065: 'c' : undeclared identifier
tracer.c
Generating Code...



cana anyone help? I have set environmental variables and all that stuff with Fluent and MSVS 2009

thanks!

Sorry I forgot to add :

I am running a 64-bit edition of windows XP with Intel Xeon processor

My perception is that your udf is wrong! you have all these messages that should be first solved in order to build your UDF. Read carefully at which line is the error and what was expected and is given!

Papteo, thanks for the reply.

The UDF has worked for the person in my position before me. It compiled for him and he was able to get simulation results. However, he is no longer with us so I have tried to recreate any steps he may have tried. Essentially, we have other UDF's that were able to compile using this method, this just adds a 4th source file.

Additionally, I get different errors if I use a different compiler, for example, vcvarsall or vcvars32. The majority of the errors for this one is the 'undeclared identifier', whereas the other have 'syntax error', and they do not occcur together.

Any thoughts or suggested routes to take?

UDF not VISIBLE
 

my udf regardin simulation of wave generation in tank,is built and loaded successfully, but is not shown in dynamic mesh control? can u guide me?

Dear Rizwan
Hi I am antikk.Here is what I did to compile UDF(ansys fluent 13.0) in my XP86 pc
=> I installed(after installation of fluent) VS2010 like you said
C:\Microsoft Visual Studio 10.0\..
but no prompt was displayed asking for command line compiler..no reboot..
=> In the Environment Variables->system variables->path...I set the value
C:\Microsoft Visual Studio 10.0\Common7\Tools;C:\Microsoft Visual Studio
10.0\VC\bin;C:\Program Files\ANSYS Inc\v130\fluent\ntbin\ntx86
=> In fluent.inc when I build my udf.c it gives this message

> Deleted old libudf\ntx86\2d\libudf.dll
1 file(s) copied.
(system "copy "C:\PROGRA~1\ANSYSI~1\v130\fluent"\fluent13.0.0\sr c\makefile_nt.udf "libudf\ntx86\2d\makefile" ")
1 file(s) copied.
(chdir "libudf")()
(chdir "ntx86\2d")()

Done.

then when I press "load" then it says

Opening library "C:\Documents and Settings\antikk\Desktop\dynamic mesh\libudf"...
Error: The UDF library you are trying to load (libudf) is not compiled for 2d on the curent platform (ntx86).
The system cannot find the file specified.
C:\Documents and Settings\antikk\Desktop\dynamic mesh\libudf\ntx86\2d\libudf.dll
Error Object: #f

If I copy any libudf.dll ansys fluent directory(C:\Program Files\ANSYS Inc\v130\fluent\fluent13.0.0\addons\adjoint\ntx86\ 2d) and try to load then it says..

Opening library "C:\Documents and Settings\Anik\Desktop\try12\dynamic mesh\udf compile test\libudf"...
Library "C:\Documents and Settings\antikk\Desktop\dynamic mesh\libudf\ntx86\2d\libudf.dll" opened
dasSolutionReset
dasInitialize
dasIsStale
dasAdvance
dasUpdateShape
dasCheckShapeStatus
dasGradient
dasModify
dasCostValue
dasReport
dasGetResidualHistory
residualHistoryWriter
residualHistoryReader
resetting
updating
locations
adjustAll
reset
morphExpectedChange
getControlBB
printVersion
countMemoryLocations
naming
meshQuality
meshAdvance
meshReport
runTest
Done.

What should I do now?
Can you HELP? PLEASE...
........my apology for this lengthy post

plz check your mesh and geometry

WINDOWS SDk
 

whether windows SDK is not required

What About SDK
 

Dear Rizwan bhai,
What about the Windows SDK in one of the post i saw that Windows SDK has to be installed and Fluent has to be opened through Windows SDK. SO as per your advice no need to open fluent through SDK we can open it directly?

I tried that part but did not work for me. Install SDK your fluent will run smoothly.
cheers

shiv

I found some information from a file "ANSYS FLUENT GUIDE Advanced FLUENT User-Defined Functions(2011)".

21.2 How to Set Environment Variables
21.2.1 On Windows 32 Bit
• If you are using Windows 32 bit, it’s better to install Visual Studio 2005 (Just install Visual C++, deselect other components)
• Then, Go to this address: “C:\Program Files\Microsoft Visual Studio\VC98\bin\”
• Double click “VCVARS32.BAT”
• Then go the FLUENT install address: “C:\fluent.inc\ntbin\ntx86\”
• And double click “setenv.exe”
21.2.2 On Windows 64 Bit
• If you are using Window 64 Bit, it’s better to install Visual Studio 2008 (Just install Visual C++, deselect other components)
• Then, Go to this address: “C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\bin\” ------> This may be wrong. It could be "...\amd64".
• Double click “vcvars32.BAT” ------> This may be wrong. It could be "vcvars64.BAT".
• Go to the FLUENT install add: “C:\Program Files\ANSYS Inc\v121\fluent\ntbin\win64\”
• And double click “setenv.exe”

Hi all, I face this error while compiling the UDF.

Error:
The UDF library you are trying to load (libudf) is not compiled for parallel use on the current platform (win64).
The operation completed successfully.
C:\Users\0wner\Desktop ry ken\libudf\win64\3d_host\libudf.dll


Could I know how to solve it? Thank you.

RPHOST?

Please refer to: ANSYS Help→ Fluent→Customization Manual→ I. Creating and Using User Defined Functions→Parallel Considerations

Dear SJSW,
Thank you for your respond. But when I run it with serial, the same problem was encountered. The error as below:

The UDF library you are trying to load (libudf) is not compiled for 3d on the curent platform (win64).
The system cannot find the file specified.

c:\users\0wner\desktop ry ken\libudf\win64\3d\libudf.dll

At the moment, I think Im facing compiling issue with Window 10. Same approach goes well with Window 7. But not working on Window 10. I have installed Visual Studio 15 and NetFramework 4.5.1.

Looking forward for the kind advise.

I installed VS2015(including c compiler) after ANSYS17 in Win10.
I didn't set up anything after installation.
They worked well.
In this way, I don't know what is wrong about your installation. @@

Ansys udf-silidification problem
 

I am working on a solidification project, I want 2 stir the molten metal for 5mins then stop the rotating region from rotating, then open d gate (i.e after 5mins of stir) so that the molten metal can flow out. I want 2 also control d mass flow rate of the solid metal at inlet such that I will introduce it within first 2 mins of impeller rotation i.e first 2 mins of stir.

Pls, I need help in writing d script for
1) d impeller or stirrer motion
2)d gate ctrl
3)mass flow ctrl
The total mass of metal is 10kg

Hi friends,
Since this is a very old post, I would like to add few more points for the new users. I was stuck with compilation error for almost two weeks.
Initially I had an nmake error(most common error) which got solved by setting the system variables correctly. Then compiler showed that my header files are missing. Here is my solution to the problem. (Depending on the platform, windows edition and MSVS edition, this solution may slightly change here and there.)
For reducing post length, I am not repeating the steps Rizwan already told.

Step1: no change

Step2a edit: the latest versions of MSVS (for eg, VS community edition 2017) will take more than 10GB space. Since I did not know which files are required/not required, I downloaded all components (including optional files)which took 34GB space. If you are a programming expert, you may optimize the size on disc.

Step2b edit: not required to change default path.

step3 edit:No popups/prompts asking to check command line compiler in new versions of MSVS(i do not know about versions older than 2017).

Step4,5,6 : no change

Step7: Go to windows desktop and search for MSVS command prompt. Open VS2015x64 native tools command prompt(This will depend on your installed MSVS version,OS platform and the processor)

Step8: check whether command prompt opens normally. In my case, it showed some error in script usage as

"Error in script usage.The correct usage is C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat[option]"
This is an issue with the latest MSVS edition. This error may also also come while upgrading from older to newer versions of MSVS. If latest installed/ upgraded MSVS version is 2017 on a 64-bit OS x64 processor, then run this.

C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\amd64\vcvars64.bat

This will set all environment variables correctly. If not 64-bit OS x64 processor, then try running batch files(.bat) similar to "vcvars64.bat" available in C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC.
(MSVS 2017 edition got installed in MSVS 14.0 folder and the command prompt will be shown as VS2015. Some mysterious way in which microsoft works. I am not a programming expert to tell you why:) )

step9: You will now be in the folder

C:\Program Files (x86)\Microsoft Visual Studio 14.0
come out of all sub folders and go to the fluent folder and launch fluent as

C:\Program Files\ANSYS Inc\v181\fluent\ntbin\win64>fluent.exe

Step10: Fluent launcher will pop up.

Change the working directory to your directory. Go to environment tab and make sure that you have the following as your path
C:\Program Files\ANSYS Inc\v150<your version>\fluent\ntbin\win64\udf.bat

Check the box>>set up compilation environment for UDF

Launch fluent.

Step:11 Compile your UDF as usual.
Add udf file. Make sure that you delete your "libudf "folder from previous attempts from working directory before building.

While building, if it shows that some "*.h"(eg, stdio.h is not a programmable file) files are missing, then you need to add one more path to the system variables.
C:\Program Files (x86)\Windows Kits\10\Include
Because, in latest MSVS editions, the header files are separately put in this folder.
Now, repeat steps 7-11.

Library will be successfully build.
After build, load it.

Thats it. Now you can run your case file. It does not matter whether you read case/data file before/ after compilation.
Hope it helps someone.