Fix: Genetic algorithm crashes when no feasible solution exists

[Her0n24]

Genetic algorithm crashes when no feasible solution exists (res.F is None -> AttributeError in terminate)

Edit: This looks related to #29 (closed), but the same error message still reappear on main. I'd like some advice for seeing this behavior.

Summary

When running the genetic algorithm with certain constraint combinations (e.g., including water_depth), the optimiser can produce no feasible solutions. In this case, pymoo returns a Result where res.F/ res.X is None, but Genetic.terminate() assumes they exist and crashes.

Steps and Configuration to Reproduce

Attached config.multipleroutes.json producing the error

config.multipleroutes.json

1. Use the above configuration and ensure "water_depth" is included in CONSTRAINTS_LIST in config.multipleroutes.json and config.py
2. Run python cli.py -f /path/to/config.json --debug True
3. Observe crash at termination

Actual Behavior

Program crashes with
File "/Users/<>/Documents/open_source/WeatherRoutingTool/WeatherRoutingTool/algorithms/genetic/init.py", line 160, in terminate best_index = res.F.argmin() ^^^^^^^^^^^^ AttributeError: 'NoneType' object has no attribute 'argmin'

Traceback points to Genetic.terminate() in init.py

Expected Behavior

If no feasible solution exists, the program should fail with a clearer message like

• No feasible solution found, all candidates violated constraints. Please rerun.

Context

If "water_depth" if removed from CONSTRAINTS_LIST in the attached config.json, the same run produces a solution and figures.
No feasible solution scenario is valid/ expected, but just the crashing and error type/ message is not.

Proposed Fix

Add a guard in Genetic.terminate() to check res, res.F and res.X for None/emptiness and raise a descriptive exception.

I'm happy to solve the issue and make a small PR.