Debugging ~6 min · ~24 min remaining

Diagnose meshes

Identify incomparable meshes, ignored quality, and fabricated convergence.

Bug hunting

Run 04_bug_hunt.mac and write for each defect: symptom, cause, evidence and correction. Look for five contaminations:

The length declared for the second case no longer matches that of the first.
It changes ESIZE unexecuted VCLEAR and mesh again.
Applies -1000 N to each tip node instead of conserving total force.
The measuring point is identified by a fixed ID.
The mesh with the most elements is chosen without calculating any physical variation.

Quick check

No pair meets the 2% threshold. What should the script record?

selected_case=0 and the need for further refinement. The last case as converged anyway.

Professional incident

The curve appears converged, but meshes are not comparable.

Evidence to retain

Initial hypothesis Changed line or block Output proving the cause Reusable prevention rule

What evidence separates the root cause from a lucky edit?

Graduated hints

1 · Concept hint

Find the first broken contract.

2 · Command hint

Inspect state related to ESIZE, CHECK, and *GET.

3 · Explained solution

Compare with the module deliverable and explain why the corrected state restores the contract.

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