[AndreaMichelotti]

Hello everyone,

I am trying to run the RAE optimization tutorial without the solution_adj_cd.dat and solution_adj_cmz.dat files because I have to optimize different configurations but the process ends after the DIRECT solution because those file are not present.

I tried to run each step of the optimization process individually but I reached the same problem. After running the DIRECT problem, I used the restart file as the solution one for the CONTINUOUS_ADJOINT problem but I received the same message:

Error in "void CSolver::Read_SU2_Restart_Binary(CGeometry*, const CConfig*, std::__cxx11::string)":
-------------------------------------------------------------------------
Unable to open SU2 restart file solution_adj_cd.dat

I saw that this is the only optimization tutorial which requires these files as in the others those files are generate within the shape_optimization procedure.

I can't figure out why I can't bypass those files or how to generate new ones because even with RESTART_SOL=NO and/or running the process step by step I face the same message.

Does anyone know what I am missing?

I attach my config files and the tutorial one.

Thank you in advance

[pcg]

Can you try reproducing those files for your new configuration? i.e. run SU2_CFD directly with MATH_PROBLEM=CONTINUOUS_ADJOINT for your initial design.

[AndreaMichelotti]

Hi!

The file RAE2822_8_1_1_600_350.cfg is the one I am using for both inviscid and viscous flow with the appropriate changes.

I use shape_optimization.py to run the process.

In the inviscid case the optimization runs fine, for the viscous it doesn't because it requires the soluiton_adjoint files.

I also tried, just in case, to change the profile with the NACA0012 as in the previous tutorial but the RANS simulation gives the same message.

I copy here the .su2 mesh so it is possible to run the case.

https://drive.google.com/file/d/1qDj...ew?usp=sharing

[AndreaMichelotti]

I have tried to run again the viscous cfg file for both my case study and the tutorial with MATH_PROBLEM=DIRECT and after that MATH_PROBLEM=CONTINUOUS_ADJOINT with and without RESTART_SOL option and in every case I received the message:

Error in "void CSolver::Read_SU2_Restart_Binary(CGeometry*, const CConfig*, std::__cxx11::string)":
-------------------------------------------------------------------------
Unable to open SU2 restart file RAE2822_8_1_1_600_350_restart_adj_cd.dat

I have also tried to run the MATH_PROBLEM=CONTINUOUS_ADJOINT with SOLVER=EULER after the DIRECT solution of the RANS case and this time it has generated the restart_adj_cd.dat file without needing it (this always happens when running an inviscid optimization process).

After that, I have run the CONTINUOUS_ADJOINT problem for the RANS case and it seems to work because the restart_adj_cd.dat file now exists. Also, it seems to converge to a solution. I don't think it is a feasable one.

I found that the RESTART_SOL seems not to work because the program continues to search for the RESTART_ADJ_FILENAME_cd.dat even thought RESTART_SOL=NO.

I don't know what to do because I don't get why this is happening.

Another viscous optimization case study is the Unsteady NACA0012 one which doesn't require the RESTART_ADJ_FILENAME_cd.dat files as initial solution for the problem. I have tried to find discrepancies but I did not find anything.

I even tried to run the TestCases/optimization_rans/steady_oneram6 and I receive the same message.

No one has ever experienced this problem before?

[qooin]

I encountered the same problem. I tried 'cont_adj_rans' of TestCase, but the problem also occured. Is resrart file necessary for continuous adjoint based on RANS？