Error hunt ~6 min · ~26 min remaining

Diagnose macros

Identify incorrect paths, out-of-contract arguments, and incorrectly propagated KEYOPT settings.

Bug hunt

Open 08_bug_hunt.mac. It contains five deliberate defects. Complete the table for each one:

Error	Symptom	Check	Cause	Minimum fix
1	Immediate `/EOF`	`/STATUS,PARM`	`ARG1 ≤ 0`	Correct the `*USE` contract
2	Macro not found	`.out` / path	Incorrect name or folder	Copy all four `.mac` files to the cwd
3	Zero load	`n_tip=0`	Empty component	Review `CM` and `SELTOL`
4	Nonsensical equilibrium	Active selection	Residual selection	`ALLSEL` between phases
5	Garbage values	`n_sets`	Extraction without `SET`	Activate the set before `*GET`

Quick check

/INPUT cannot find 08_build.mac. What should you check first?

Relax the deflection tolerance. Verify the working directory and the filename in the .out file. Change SOLID185 to SOLID186.

Professional incident

The macro fails in a clean directory.

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 /CLEAR, /INPUT, and *CFOPEN.

3 · Explained solution

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

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