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RPC_X_WRONG_ES_VERSION
The serialization package version does not match the decoder
RPC_X_WRONG_ES_VERSION indicates a version mismatch in RPC Encoding Services data or its serialization context. The buffer may have been produced by an incompatible generated interface, serialization package, or application envelope even though it is readable as ordinary bytes.
Record the producer build, interface UUID/version, stub generation options, and any application header surrounding the serialized NDR stream. Do not attempt to decode by skipping bytes until it works; alignment and type layout are part of the format. Version stored data explicitly and keep the matching decoder available during migrations.
What to inspect
- Compare producer and consumer IDL and generated stub versions.
- Validate application framing before passing the buffer to RPC decoding.
- Use an explicit migration path for persisted serialized data.
References
- Microsoft: RPC serialization formats
- Microsoft: serialization buffer requirements
- Microsoft: Encoding Services status values
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