Debugging ~5 min · ~24 min remaining

Diagnose before correcting

Connect each symptom to a likely cause and a concrete check without changing options at random.

Common mistakes

Symptom	Likely cause	Check
`File not found`	The `.mac` is not in Working Directory.	Check folder and name in `/INPUT`.
Division by zero	No nodes found in `x=1.0`.	Review geometry, mesh and selection.
No contours	There is no valid result set.	Look for `SOLVE` errors in `m00_session.out`.
Displacement toward +Y	The load sign changed.	Review `FY` and its sign.
Gigantic displacement	Inconsistent units.	Check meters, newtons and pascals.
Only part of the model appears	Residual selection.	Run `ALLSEL,ALL`.

What we have chosen to postpone

M00 does not use local coordinate systems, work plane, loads on element faces or SFCONTROL. They are valid tools, but introducing them here would hide the essential workflow.

We simplify the model, not the explanation. Each concept will appear when solving a problem that the student already recognizes.

Quick check

The model shows only part of the geometry. What would you check first?

Whether a residual selection remains and ALLSEL,ALL is missing. Whether the contour color is appropriate. Whether to change the analysis type.

Professional incident

Incident M00: diagnose before editing

The run finishes, but the results belong to the wrong job.

Execution cycle

1 Run the broken script in a clean folder.
2 Preserve the original .out.
3 Write one causal hypothesis and make one change.
4 Compare evidence before and after.

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 /FILNAME and /INPUT.

3 · Explained solution

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

Your reflection stays in this browser.

View complete module Download m00-kit.zip