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---
name: orcaflex-line-wizard-common-errors-and-fixes
description: 'Sub-skill of orcaflex-line-wizard: Common Errors and Fixes (+1).'
version: 1.0.0
category: engineering
type: reference
scripts_exempt: true
---
# Common Errors and Fixes (+1)
## Common Errors and Fixes
| Error | Cause | Fix |
|-------|-------|-----|
| `Wizard did not converge` | Target tension unachievable with current line geometry | Increase `MaxDamping` (try 50, 100, 200); check target is physically possible |
| `Line not found` | Line name in config doesn't match model | Check exact spelling and case of line names in model |
| `Singular Jacobian` | Too many lines configured simultaneously | Reduce number of included lines; solve in batches |
| Wizard converges but tension wrong | Wrong `LineEnd` specified (End A vs End B) | Verify which end connects to vessel (usually End A for fairlead tension) |
| Length becomes negative | Target tension too low for line weight | Increase target tension above minimum catenary tension |
| Wizard changes wrong section | `length_index` not targeting the adjustable section | Verify which section should change length (typically the longest segment) |
## Debugging Wizard Failures
```python
def diagnose_wizard_failure(model, line_name, target_tension):
"""Diagnose why Line Setup Wizard fails for a specific line."""
line = model[line_name]
issues = []
# Check line is properly connected
end_a = line.EndAConnection
end_b = line.EndBConnection
if end_a == "Free" and end_b == "Free":
*See sub-skills for full details.*
