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RPC_NT_UNSUPPORTED_TYPE
The RPC type UUID cannot be used for this operation
This status points to a type UUID mismatch. In RPC, UUIDs identify interfaces, objects, types, and transfer syntax, so an unsupported type usually means the peer or name service entry does not understand the requested UUID/version combination.
The useful evidence is the UUID being sent, its version, and whether the server registered the corresponding interface or object. It is not enough to verify only that the endpoint is reachable.
What to inspect
- Capture the interface/type UUID and version from the binding or name service entry.
- Confirm that the server registered the expected interface implementation.
- Check client and server IDL/MIDL output for version skew.
References
- Microsoft Open Specifications: MS-RPCE
- Microsoft: Registering RPC interfaces
- Microsoft: RPC name service entry overview
- Microsoft Open Specifications: NTSTATUS values
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