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RPC_E_TIMEOUT
COM/RPC operation exceeded its timeout
RPC_E_TIMEOUT is HRESULT 2147549471 (0x8001011F) from winerror.h. The documented description is “This operation returned because the timeout period expired.” The relevant context is the COM/RPC call control, message filtering, apartment routing, marshaling, security negotiation, or remote object lifetime.
Where it is encountered
- Cross-apartment or cross-process COM method invocation and activation.
- STA message filtering, reentrancy, call cancellation, timeout, or retry handling.
- DCOM security initialization, proxy/stub marshaling, OBJREF processing, and server object lifetime.
The immediate focus is a synchronous or asynchronous remote call that did not complete within the configured deadline.
What to verify
Verify that the deadline, server activity, network state, cancellation state, and possibility of late server completion are known. Validate this condition using the owning API state, not an inferred UI symptom.
Correct handling and recovery
Treat the outcome as uncertain for non-idempotent methods, query server state before retrying, and use bounded deadlines with correlation IDs.
Reconcile partial output and server-side effects before attempting the operation again.
Practical scenario
A remote create request times out after the server commits the object. The client queries by idempotency key before deciding whether to issue another create.
Difference from nearby HRESULTs
It means the caller stopped waiting; it does not prove the server rolled back. RPC_E_SERVERCALL_RETRYLATER is an explicit busy response.
Developer and administrator guidance
After it, avoid broad permission grants or system-wide resets unless code-specific evidence proves a global configuration problem.
References
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