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Known limitations

An honest list. These are things the current version cannot do — not “will be better later” politeness.

Versions

Item Status
SolidWorks 2025 SP5.0 ✅ fully verified
SolidWorks 2019–2024 ❌ untested
Older file formats ❌ unsupported (files saved by 2025 cannot be opened by 2019)

The generated C# calls the Interop DLL of whatever version is installed, so it will probably run on 2024 — but untested is not supported. Version compatibility is the main goal of v0.9.

Geometry

Item Note
Primitives box, plate, 4-plate square tube (XYZ), cylinder (XYZ), revolve (XYZ), fillet, chamfer
Revolve profile must be a closed polygon, may not self-intersect
Edge rules straight edges only (filtered by axis + length); no radius-based edge selection
Negative-offset planes fail on some versions; the builder only inserts an offset plane when y0 > 0
Performance about 2.65 s per shape; 100 shapes take roughly 4.5 minutes

Drawings

Item Note
Auto annotation InsertModelAnnotations4 inserts model driving dimensions, deduplicated across views, capped around 18
Overall dimensions supported, but the right/top view may snap to inner contours (measured 114 / 14 where 100 was expected)
Dimension avoidance ❌ none; dimensions may overlap geometry or each other
Tolerances v1.4 accepts explicit symmetric/bilateral/limit/fit requirements with readback; no automatic grade selection
Surface finish v1.4 supports native straight-edge attachment, leaders and standalone symbols; positions in metres; curved edges and assembly-view attachment are unverified; no automatic avoidance
Geometric tolerance (GD&T) ❌ unsupported
Full annotation pipeline ❌ MechDog’s annotations=True path still produces PDF err=1

Conclusion: explicit tolerances and surface finish can be added in v1.4. Drawings still need process review, complete annotation and human sign-off. See annotation usage.

Assembly

Item Note
Insert + fix ✅
Concentric mate v1.4.1 supports explicit persistent face references, including unequal hole/shaft radii; automatic selection can still choose unintended faces
Coincident mate v1.4.1 supports explicit planar faces with assembly-space normal and gap readback
Distance / angle / gear mates ❌ not implemented
Sub-assemblies ❌ untested
Assembly-level interference API ❌ returns 0 for a known 500 mm³ overlap on this machine — unusable
Interference detection ✅ via part-level boolean intersection (bodies must be in the same part)
BOM ❌ not implemented
Exploded views ❌ not implemented

Resources and stability

Item Note
Document cap 8 by default; creation is refused above it (configurable per call)
Resource guard three tiers (ok / warn / critical) plus safe sweeping
Scope of the cap guarantees document count only, not that any given model cannot crash
Closing documents only documents this run created; anything with unsaved changes is skipped
Killing processes ❌ never; the user must handle it

Platform