[Shreyaskini20]

Hi all,

I am trying out the following test-case:

- Deform an airfoil (SU2_DEF)
- Compute the direct and adjoint solution (SU2_CFD and SU2_CFD_AD)
- Get the gradient of the drag with respect to the deformations for multiple FFD_CONTROL_POINT (SU2_DOT_AD)

I am trying the following syntax:
DV_KIND= FFD_CONTROL_POINT, FFD_CONTROL_POINT, ...
DV_PARAM= (SCB1, 0, 0, 0, 0, 0, 1); (SCB1, 0, 0, 1, 0, 0, 1); ..
DV_VALUE= 0.2, 0.2, 0.2, ..

On running SU2_DOT_AD I am getting the the following error:
[localhost:07682] *** Process received signal ***
[localhost:07682] Signal: Segmentation fault (11)
[localhost:07682] Signal code: (128)
[localhost:07682] Failing at address: (nil)
[localhost:07682] [ 0] /lib64/libpthread.so.0(+0xf5d0)[0x7f7b143da5d0]
[localhost:07682] [ 1] SU2_DOT_AD[0x67546e]
[localhost:07682] [ 2] SU2_DOT_AD[0x65128d]
[localhost:07682] [ 3] SU2_DOT_AD[0x671c96]
[localhost:07682] [ 4] SU2_DOT_AD[0x41e10a]
[localhost:07682] [ 5] /lib64/libc.so.6(__libc_start_main+0xf5)[0x7f7b14020495]
[localhost:07682] [ 6] SU2_DOT_AD[0x53bbee]
[localhost:07682] *** End of error message ***

I am using SU2 6.0.0 "Falcon".

Thank you very much for your help!

[mardar572]

I have the same problem also.

[wallym]

Hi Mardar572,

Can you explain more in depth your issues?
Are you using v6.2? If so, you should migrate to v7.4 as is it the most up-to-date.

[mardar572]

Hi wallym,

I have two computers. One is ubuntu other ıs centos. They have exact same installation of SU2 7.4.0. Ubuntu can run the following tutorial without any problem.

https://su2code.github.io/tutorials/...ained_ONERAM6/

However, centos has a problem while running SU2_DOT_AD. As follows:

---------- Start gradient evaluation using sensitivity information ----------

Evaluate functional gradient using Algorithmic Differentiation (ZONE 0).
1 Free Form Deformation boxes.
1 Free Form Deformation nested levels.
FFD box tag: WING. FFD box level: 0. Degrees: 10, 8, 1.
FFD Blending using B-Splines. Order: 0, 0, 0. 
Number of parent boxes: 0. Number of child boxes: 4836.
Segmentation fault (core dumped)

Thanks

[wallym]

Hmmm, I don' think I can help here. Could you post the SU2 github? This issue should get more traction there.

Thanks