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STATUS_GRAPHICS_TOPOLOGY_CHANGES_NOT_ALLOWED
The topology is in a phase where path changes are not permitted
Some VidPN objects can be queried or have path attributes updated while still forbidding topology membership changes. This status means the caller attempted to add, remove, or otherwise alter paths at a time when the topology must remain fixed.
The usual mistake is mixing validation/commit phases with construction phases. Once the VidPN manager or miniport is validating a proposed topology, code that still tries to augment or prune paths may violate the object contract.
What to check
- Identify whether the failing operation adds/removes paths or only updates attributes.
- Separate topology construction from validation and commit phases in logs.
- After this status, reacquire or rebuild a modifiable topology instead of mutating the locked one.
References
- Microsoft: VidPN objects and interfaces
- Microsoft: Introduction to Video Present Networks
- Microsoft: DXGKDDI_RECOMMENDVIDPNTOPOLOGY
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