The partcad remote sandbox rewrote file paths on the command line but not in the request on stdin, so readers looked for files that did not exist in the container. IGES parts failed with OpenCASCADE could not read plate.igs, and STEP assembly imports broke the same way. The sandbox lost every file path passed in the request, so STEP, IGES and URDF imports failed in upload mode.
Recurring agent failure issue in partcad (partcad)
What engineers report
A recurring agent failure problem in partcad (partcad) that mostly hits the mechanical designer.
Failure pattern: validation / failure
Analyst note
From the Grok pain-radar digests, Nov 9-10 2026 (Nov 9 7:41 AM ET through Nov 10 7:41 AM ET digests plus the Haitch editions). Verified live 2026-11-10: 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 partcad (partcad).
Evidence
More recurring errors in partcad (partcad)
- A second caller could get a part object half built, before its path and cache dependencies were set; that failed CI as os.path.exists(None). The fix registers an object only once its factory has finished.MCAD · impact 74
- partcad gen skills now write target dimensions down with a source, datum and tolerance, draw a candidate, render it, measure the same dimensions on the render, and correct until each is in tolerance. It is a full verification loop bolted on because the agent guesses were not good enough.Verification · impact 74
- A part referenced through an alias, like goBILDA's E-clip bought under each shaft's SKU, was drawn in the default colour and weighed nothing, because the alias did not carry its source's material and mass. Export and info commands found no material data on it.MCAD · impact 66
- Each exporter used to say its own thing about a face, and an uncoloured face came out goldenrod. Now one module feeds STEP, glTF, 3MF and URDF so they agree on colour and material.MCAD · impact 66
- partcad CMF series packs a palette of colour, material and finish sets into a binary section after the BREP, per part, per solid and per face, and has the core write it after any offset or scale so assemblies keep it. OCCT readers ignore the trailing bytes, and a test holds them to reading the same geometry.PLM · impact 66
- PartCAD first CMF PR adds colours, materials and finishes as declarations. A manufacturable flag separates this can be bought from a display hint, so a render colour is not mistaken for a finish spec.PLM · 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.