Fix CUSTOM_OBJFUNC and TAVG_CUSTOM_OBJFUNC missing from historyMap

[Ovocode05]

Fix: Add CUSTOM_OBJFUNC and TAVG_CUSTOM_OBJFUNC to historyMap.py

Fixes Issue

#2586 — Custom Objective Function Does not Work with shape_optimization.py

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Root Cause

historyMap.py is the bridge between the C++ solver output and the Python
optimization framework. Every objective function used in shape_optimization.py
must have a corresponding entry in this map. The entry tells Python:

• Which GROUP to look in (e.g. COMBO, AERO_COEFF)
• Which HEADER column to read from the history CSV file
• What TYPE the field is

CUSTOM_OBJFUNC was never added to this map, despite being fully implemented
in C++ since v7.0.

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Test Case

Tested using TestCases/optimization_euler/steady_naca0012/inv_NACA0012_basic.cfg
with the following custom objective (p-norm of surface pressure):

CUSTOM_OUTPUTS= 'P50_avg : AreaAvg{pow(PRESSURE,50)}[airfoil]; P_pnorm50 : Function{pow(P50_avg, 1.0/50.0)}'
CUSTOM_OBJFUNC= 'P_pnorm50'
OBJECTIVE_FUNCTION= CUSTOM_OBJFUNC
OPT_OBJECTIVE= CUSTOM_OBJFUNC * 1.0

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How to Run

cd TestCases/optimization_euler/steady_naca0012/

python SU2_PY/shape_optimization.py -g DISCRETE_ADJOINT -f inv_NACA0012_basic.cfg

Before Fix

Crashes immediately — no simulation runs at all.

After Fix

Full optimization loop completes successfully.

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Related Issues

• Fixes Custom Objective Function Does not Work #2586
• Related to multi-objective shape design tutorial does not work #2489 - resolved by above fix
• Related to Turbomachinery adjoint objective functions #889

[pcarruscag]

There is a PR open, you can see what are the issues there #2587