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RPC_S_INVALID_TIMEOUT
The timeout is a relative RPC setting, not a duration in seconds
RPC_S_INVALID_TIMEOUT can be returned by RPC communication-timeout configuration when the supplied value is not in the accepted range. For RpcMgmtSetComTimeout, Microsoft documents values from 0 through 10. Those numbers represent relative timeout levels; they are not literal seconds or milliseconds.
That distinction is important when an application reads a conventional timeout from configuration and passes it directly to RPC. A value such as 30 may be sensible as seconds in the application, but it is invalid for this API.
What to check
- Verify that the caller uses an
RPC_C_BINDING_*_TIMEOUTconstant or a documented value in the 0 to 10 range. - Do not assume the value has identical behavior on every protocol sequence. The RPC runtime can treat it as a transport-specific communication hint.
- Keep call cancellation and application deadlines separate from the RPC communication timeout; they solve different failure-detection problems.
Log both the protocol sequence and the exact timeout value before the setter call. That usually exposes configuration-unit mistakes immediately.
References
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