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RPC_NT_UNKNOWN_MGR_TYPE
RPC_NT_UNKNOWN_MGR_TYPE is an NTSTATUS value used by the Windows RPC runtime. RPC can map objects to manager types so that the runtime selects the correct implementation for an object-specific call. This status means that the requested manager type UUID is unknown to the runtime. It is a dispatch-registration failure rather than a transport or endpoint failure.
It differs from RPC_NT_UNKNOWN_IF, which concerns the interface contract, and from RPC_NT_OBJECT_NOT_FOUND, which concerns an object UUID. Diagnosing all three as an “RPC server unavailable” error loses the decisive layer.
Object dispatch requested a manager type that has not been registered
- Log object UUID, manager type UUID and interface UUID separately at the point of dispatch.
- Verify that the module registering manager types is loaded before object-specific calls are accepted.
- Check teardown/reload paths that can unregister type information while a binding remains usable.
References
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