KiCad 9.0.9's own 3D models fail import in a STEP kernel because faces of one solid overlap. A STEP fuzzing campaign found CP_Radial_D8.0mm capacitors and a Molex Micro-B USB connector from the stock KiCad library fail import with overlapping faces. The thread has 10 comments.
Recurring agent failure issue in ryucad (Seiraiyu)
What engineers report
A recurring agent failure problem in ryucad (Seiraiyu) that mostly hits the mechanical designer.
Failure pattern: validation / failure
Analyst note
From the Grok pain-radar digests, Nov 10-11 2026 (Nov 10 8:41 AM ET through Nov 11 7:41 AM ET digests plus the Haitch editions). Verified live 2026-11-11: issue/PR read; title and state confirmed.
What it costs a team
Modeled annual cost
$30,000
For a team of 5
Prototype delay
3 days
Modeled schedule slip per occurrence
Time lost
240 min
Per engineer per month, about 1 incidents
How the cost is modeled
240 min/month × 5 engineers × 12 months = 240 hours × $125/hour = $30,000
A modeled estimate with medium confidence. Swap in your own team size and loaded rate to size it for your team.
Engineering tools that address it
No engineering tool profile lists this error yet. Browse tools that connect to ryucad (Seiraiyu).
Evidence
More recurring errors in ryucad (Seiraiyu)
- A STEP import campaign over KiCad 9.0.9's 3D model library refused 230 models because bent pins and leads are built on horn tori, which the kernel calls degenerate even though no face uses the bad region: 95 D-sub connectors, 49 axial resistors and 34 DC-DC converters among them. The campaign PR records 2,642 ledger lines for KiCad's models and files issues #311 to #326, one per root cause.MCAD · impact 74
- 44 KiCad models write the component body and its pins as separate solids that share faces, and the importer heals the whole representation as one body, so the shared faces overlap and the import fails. RF modules, QFNs, MEMS mics and USB connectors are in the list, and the fix is a choice about how to import touching solids, one body per solid or a union.MCAD · impact 66
- 94 KiCad models are refused as non-manifold where the file shows no edge used three times, so either the solids touch after sewing and the file is wrong, or sewing joined what it should not. Each one needs someone to look at the named vertex or edge, and 31 are THT LEDs.MCAD · impact 66
- A rerun over 481 cases found 14 KiCad 3D models still failing import exactly as the closed issues described. "The fixes didn't reach them." Each still needs a call on whether the file is at fault or healing should take it.MCAD · impact 66
- A vendor's STEP model of an ST Nucleo board imports into ryucad as 402 parts, and the app takes about 8 minutes to open. The user wants purchased PCBAs, connectors and motors brought in as one flattened reference part, and his workaround is an OCCT script that collects every solid with its location into a single-product STEP before import.MCAD · impact 66
- End-to-end acceptance of a git-based CAD tool found a boolean that subtracts a box whose corner sits on a sphere's centre and silently returns the target unchanged while checks pass; a committed release also stays labelled "proposed" after the release branch moves, with no obsolete warning.MCAD · impact 66
Sourced from public community reports. Costs and delays are modeled estimates, not measurements. Know a better source or a fix? Tell us at hello@productflo.io.