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CO_E_SCM_RPC_FAILURE
CO_E_SCM_RPC_FAILURE — 0x80080003
This code places the first failure in RPC exchange with the COM SCM. Operationally, the client selected the SCM activation path but the RPC request or reply failed before a usable class object was returned.
What the status narrows down
COM activation is a sequence rather than a single operation: registration lookup, SCM or surrogate selection, process startup, class-factory publication, marshaling, and finally the requested interface call. The useful evidence is the evidence from the first stage that fails; a later RPC or cleanup message can otherwise hide the original activation problem.
Do not collapse this result into a nearby status. A server that starts and then crashes can surface as an RPC failure, so reachability alone does not prove the network is responsible. Compare lifecycle, identity, caller, and first API.
Evidence worth preserving
| Record | How it narrows the cause |
|---|---|
| RPC status nested in the HRESULT, client/server machine, protocol sequence, and endpoint | Creates a stable before/after control. |
| RPCSS/DCOM service health and network/firewall state at the failure timestamp | Tests whether the first boundary moves. |
| Packet loss, authentication package, name resolution, and dynamic RPC port reachability | Pins evidence to one attempt. |
| Server process lifetime and whether it exits while the activation RPC is outstanding | Separates contract failure from environment. |
The goal is reproducibility, not a full data dump. Prefer object IDs, configuration exports, event correlation, and redacted paths over credentials, cryptographic material, or user content.
A controlled diagnostic sequence
- Test local activation on the server to separate registration from network RPC; use a disposable or backed-up environment when the comparison changes boot, security, device, queue, or encryption state.
- Use an RPC connectivity test while preserving authentication and machine names; retain one negative control so that a broad workaround is not mistaken for a root-cause correction.
- Capture one failing activation with ETW or network trace and compare it with a successful control; keep every other input fixed and record the first event that differs from the failing run.
How to read the outcome
The following decision points keep the investigation tied to the returning operation:
| Observed result | Interpretation |
|---|---|
| The minimal or known-good comparison succeeds | The control works; inspect production-specific state. |
| The control fails at the same first operation | The control also fails; inspect host/provider evidence. |
| A new HRESULT marks another boundary | this boundary moved; diagnose the new status separately rather than treating it as confirmation that the entire operation is fixed. |
Correction and proof
Apply the smallest change that addresses the first rejected condition: Correct the RPC/DCOM transport, authentication, endpoint, or server crash identified by the first failed exchange. Preserve the pre-change configuration or trace.
Close the incident only when cold and concurrent activations complete without RPC retries, while a blocked dynamic-port control produces a distinct and reproducible transport failure. Repeat under the original identity and state. A different environment is comparison, not proof.
Technical references
These references define the HRESULT family and subsystem contract used above:
- Microsoft Open Specifications: HRESULT values.
- Microsoft: COM clients and servers.
- Microsoft: CoGetClassObject.
- Microsoft: COM elevation moniker.
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