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RPC_NT_WRONG_PIPE_VERSION
Unsupported RPC pipe version
RPC_NT_WRONG_PIPE_VERSION is a version-compatibility problem in the RPC pipe support layer. The pipe object format or generated stub expectations do not match what the runtime is prepared to process.
This is most likely after mixing generated stubs, headers, proxy/stub DLLs, or application components built with different MIDL/runtime assumptions. The endpoint can be reachable while the pipe object representation is not compatible.
What to check
- Rebuild all pipe-using components from the same IDL and deploy generated artifacts together.
- Check whether only pipe methods fail while non-pipe methods on the same interface work.
- Look for stale proxy/stub DLLs loaded from a different directory than the application binary.
References
- Microsoft RPC: pipes
- Microsoft MIDL: pipe type constructor
- Microsoft RPC: client-side pipe implementation
- Microsoft RPC: serialization services
- Microsoft Open Specifications: MS-RPCE overview
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