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STATUS_GRAPHICS_INVALID_PATH_IMPORTANCE_ORDINAL
The path priority value is outside the valid topology ordering
VidPN present paths can carry an importance ordinal used when the system or driver reasons about which paths matter most under constraints. This status means a path has an ordinal value that is invalid for the topology or duplicates/exhausts the available ordering scheme.
The problem is policy metadata attached to the path, not the source-target pair itself. It often follows topology augmentation code that appends paths without assigning fresh ordinals, or clone/extend conversion code that copies ordinals from another topology.
What to check
- List every path and its importance ordinal before validation.
- Assign ordinals after the final path set is known, not before augmentation or pruning.
- Do not copy ordinal values between independent topologies without checking availability.
References
- Microsoft: Introduction to Video Present Networks
- Microsoft: VidPN objects and interfaces
- Microsoft: D3DKMDT display data types
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