[Eduardo Carvalho]

Hi All,

I'm trying to run the unsteady adjoint pitching_naca64a010_rans test case, but I'm always finding the same error at the log_Adjoint.out file:

Loading flow solution from direct iteration -1.


Error in "std::__cxx11::string CConfig::GetUnsteady_FileName(std::__cxx11::string , int)":
-------------------------------------------------------------------------
Requesting a negative iteration number for the restart file!!
------------------------------ Error Exit -------------------------------

It seems that the "UNST_ADJOINT_ITER=" command sets the first direct iteration to be used at the adjoint solution, but iterating at an inverse temporal sequence.

The problem seems to be that the adjoint solver doesn't stop at iteration number 0 and tries to continue to -1, where the error occurs.

Can I set a specific iteration where this process stops?
How can I choose the range of direct iterations used by the adjoint solver?

I'm using SU2 Version 6.2.0 "Falcon".

[Eduardo Carvalho]

I finally solved this problem for v6 using:

RESTART_SOL= NO (This command needs to be specified, although I don't know exactly it's effect at the adjoint optimization)

UNST_RESTART_ITER = 2 (Even with "RESTART_SOL= NO" this parameter still needs to be specified, or SU2 will stop at the first design. I also don't know it's effect at the optimization, but using "2" seems to work)

EXT_ITER= 99999 (Setting this parameter smaller than the number of possible iterations made by the physical time will generate an index error, the same one that I described on my previous message, so use "EXT_ITER" >= "UNST_TIME" / "UNST_TIMESTEP" )

% Restart flow input file
SOLUTION_FLOW_FILENAME= restart_flow.dat
%
% Restart adjoint input file
SOLUTION_ADJ_FILENAME= solution_adj.dat
%
% Output file restart flow
RESTART_FLOW_FILENAME= restart_flow.dat
%
% Output file restart adjoint
RESTART_ADJ_FILENAME= restart_adj.dat