Hi I am new fluent user. I cannot compile the tuterial file(dynamic mesh example)(valve.c) from the COMPILED UDFs Panel and when I press the build button i recieve this message

('nmake' is not recognized as an internal or external command operable program or batch file.) and then when i load it i recieve this error

(Error: open-udf-library: the system cannot find the path specified)

what should i do?

Regards, Alper

I am having the same problem and still could not solve it!!!! What compiler are you using?

Hi

I dont know whether fluent needs another outof-fluent compiler such as visual c++ for compiling in itself. Because in fluent help I read such sentences

1.Compiled udf's are build in the same way that the fluent executable itself is build

2.A script called "Makefile" is used to invoke the system C compiler(???) to build an object code library

3.The object code library contains the native machine language translation of your high level c source code

4. This shared library is then loaded into fluent at runtime by process called "dynamic loading".

If you say that "Yes it needs outof-fluent C compiler" then I ask how fluent finds the path of your C compiler?

After all it is better that i answer your question. Yes I have a (Microsoft visual c++ 6) installed in my computer.

Thanks for your attention, Alper

Please work in Command Prompt Window of C++, and launch Fluent, then try to compile UDF. It may work.

You should keep your UDF file in the temp directory of your computer...

Hi

I finally could compile the file having visual c++ 6 installed in my computer. thanks for all of you for your attention. See you in other problem!

Best Regards, Alper

Try this You need to follow the following steps 1) set up the environmental variable This is done by going to the start menu > Programs>Fluent> Set_environment clicking this would set the path and variable. 2) set up a directory structure as follows create a dir libudf in that create "src" and "ntx86". In ntx86 create "3d".( am asuming that ur simulation is 3d) 3) copy the udf (.C file) and the required header( u can get the header files frm c:\FLUENT.INC\fluent6.*.*\ntx86\src) files into the "src" folder. 4) go to c:\FLUENT.INC\fluent6.*.*\ntx86\3d copy the contents into the 3d folder which you created. 5) go to c:\FLUENT.INC\fluent6.*.*\ntx86\src copy makefile_nt.udf and user_nt.udf to your 3d folder 6) rename makefile_nt.edf to makefile and open user_nt.udf and read the instructions and do accordingly. 7) close FLUENT . Open command prompt ( start > accessories > command prompt ) type the following C:\ CD program Files \ microsoft visual studio .net\vc7\bin 8) type :- vcvars32 9)go to the libudf\ntx86\3d which u have created 10) type nmake 11) This will compile ur code and build a lib if u dont have any errors , if errors are present it will say so u need to debug it then. 12) once this is done u can open fluent again and load the lib u have just created , in this case it would be libudf.

hari

Hi hari

Thank you very much indeed. Your guidance realy worked very well. But I have some more questions. Sorry for my ignorance.I am not well in computer science.

1:What vcvars32 does?

2:Then what nmake does?

3:why when i work with (Visual c++ 6) rather than (visual studio.net) there is no need for such steps you've mentioned?

4:when fluent solve a case which have a compiled udf, Does fluent use out-of-fluent compiler(such as visual c++) in the same time when it iterates?

Thanks for devoting your time for me.

Best regards, Alper