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ERROR_GRAPHICS_MAX_NUM_PATHS_REACHED
Locate the failing graphics boundary: graphics max num paths reached
ERROR_GRAPHICS_MAX_NUM_PATHS_REACHED, value 0xC0262359, is produced by vidpn when the candidate topology would exceed the number of simultaneous source-target paths supported by the adapter. The investigation should stay attached to adapter present-path capacity and to the exact generation in which it was obtained.
Evidence that makes the result actionable
| Capture item | Why it matters |
|---|---|
| Supporting trace | source and target IDs, topology generation, path descriptors, pinned modes, mode-set handles and monitor timing data |
| Object identity | adapter present-path capacity |
| Rejected condition | the candidate topology would exceed the number of simultaneous source-target paths supported by the adapter |
| What to capture | current paths, proposed path, source/target IDs, adapter path limit and clone/extend mode |
| Current graph state | VidPN, topology, source and target mode sets, and the present path connecting them |
A controlled comparison
- Remove one path or switch from extend to a supported clone arrangement.
The comparison with ERROR_GRAPHICS_VIDEO_PRESENT_TARGETS_LESS_THAN_SOURCES is especially useful: ERROR_GRAPHICS_VIDEO_PRESENT_TARGETS_LESS_THAN_SOURCES describes an insufficient-target topology relation.
Correction and proof
Construct topologies within the driver-advertised path capacity and present a clear UI fallback.
- debug-layer, ETW or driver diagnostics no longer report the rejected adapter present-path capacity contract during the same scenario.
Technical references
- Microsoft: Introduction to Video Present Networks — background for the adapter present-path capacity.
- Microsoft: VidPN objects and interfaces
- Microsoft: Enumerating cofunctional VidPN modes
- Microsoft: Determining VidPN support
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