FAQ

Can I use COBRA without the GUI?

Yes. Script mode is fully supported. Start with Getting Started -> Quickstart.

Can I mix ONNX and Touchstone components?

Yes. Map each component to either .onnx or fixed .sNp in the same run.

Is ORCA required?

Not for core surrogate optimization with existing ONNX files.

ORCA is required if you need ORCA geometry classes/workflows, especially for fine-tuning scenarios.

Is Palace required?

No. Palace is optional and only needed for EM fine-tuning.

Which optimizer should I start with?

Start with OptunaOptimizer (sampler="tpe") for most cases.

Where are outputs saved?

COBRA writes each run to a timestamped directory under results/.

How do I keep symmetric constraints?

Use linked_to in OptimizationProperty so one variable mirrors another.