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SU2 not built with CGNS support.

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Old   October 7, 2015, 15:23
Default SU2 not built with CGNS support.
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Max
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Hello,

I have installed the 4.0.0 version of SU2 for Windows. I have run several test cases which use the .su2 mesh format with little issue. Now, when I try to run my own case which uses a .cgns mesh format I get errors saying that SU2 was not built with CGNS support. I tried to run a different test case that had a CGNS mesh and it did not work either. The exact message displayed is:

SU2 built without CGNS support!!
To use CGNS, remove the -DNO_CGNS directive from the makefile and supply the correct path to the CGNS library.

I am a new user so this may be a simple fix. However, on the Windows Installation page it states that CGNS 3.1.4 is included in the installer.

How do I resolve the issue?
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Old   October 29, 2015, 07:42
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Ouissem B.
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Quote:
Originally Posted by maximus23 View Post
Hello,

I have installed the 4.0.0 version of SU2 for Windows. I have run several test cases which use the .su2 mesh format with little issue. Now, when I try to run my own case which uses a .cgns mesh format I get errors saying that SU2 was not built with CGNS support. I tried to run a different test case that had a CGNS mesh and it did not work either. The exact message displayed is:

SU2 built without CGNS support!!
To use CGNS, remove the -DNO_CGNS directive from the makefile and supply the correct path to the CGNS library.

I am a new user so this may be a simple fix. However, on the Windows Installation page it states that CGNS 3.1.4 is included in the installer.

How do I resolve the issue?
Hi!

Actually, you have to specify the path for the CGNS library in the configuration step while installing SU2. As far as I know, it's only faisable when compiling and installing from the source code!

I've tried to do the same few weeks ago (and I asked the same question as you right here!) but went finally for Linux. It works just fine!

On linux, you have to specify :

--with-CGNS-lib=/path/to/CGNS/lib --with-CGNS-include=/path/to/CGNS/header

in the configuration (./configure) step when compiling the source code.

It maybe done using CygWin on Windows, but I didn't try it.
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Old   May 10, 2016, 11:49
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tom pratt
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Hi folks,
i'm having this exact issue now after building su2 without cgns support. i am now having trouble actually finding the paths which i need to include to the cgns library etc. should these directories have been included as part of the original source code download? and if so does anyone have an idea where i might find them?
many thanks!
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Old   May 11, 2016, 09:02
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You can try to use the command

locate libcgns.a (or .so it depends on how they were compiled)

and

locate libcgns.h

to find the path
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Old   May 11, 2016, 09:05
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Ole Burghardt
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Hi Tom,

no, the CGNS libraries are not included in the SU2 source code folder.

Do you have CGNS installed on your system? If so, first place to look at might be /usr/lib and /usr/include.
If not, then it's up to you where you want to install them, so you must choose the path.

Regards,
Ole
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Old   May 11, 2016, 13:05
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Max
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Tom,

I could not fix the problem with the windows version. I talked my department's IT people to let me dual boot my workstation with Ubuntu and that is what I use now. Like Ouissem, I have found that everything works now. If you make the switch too, I may be able to help get you started.

Max
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