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| MSG_CI_CREATE_SEVER_ITEM_FAILED | E_NOINTERFACE |
E_NOTIMPL
Requested COM operation is not implemented
E_NOTIMPL is HRESULT 2147500033 (0x80004001) from winerror.h. The documented description is “Not implemented.” The value must be interpreted at an interface method, optional capability, proxy, or compatibility shim.
The selected object deliberately has no implementation for the invoked method rather than merely rejecting the current input. Keep the symbolic name beside the raw hexadecimal value so later analysis does not collapse the result into an unrelated COM family.
Where the result appears
- This result may surface in an interface method, optional capability, proxy, or compatibility shim.
Determine the object and lifecycle phase that owned this result; a UI symptom cannot establish whether the origin was the caller, proxy, runtime, server, or metadata producer.
Typical causes and interpretation
Common cause categories are: an optional method was left as a stub; an older server implements an earlier contract; a projection invoked a member not supported by the native component. Evaluate these branches independently and require evidence from the owning API before promoting one branch to the root cause.
Key distinction: the selected object deliberately has no implementation for the invoked method rather than merely rejecting the current input.
Correct handling and recovery
The appropriate recovery is to branch on capability before invocation, choose the documented fallback, or deploy a component version that implements the contract; repeated calls with identical inputs are not useful. The owner of retry must define idempotency, refreshed state, maximum attempts, backoff, and cancellation responsibility.
After this result, apply the API-specific validity rules to outputs and release only resources whose ownership transferred during this attempt.
Practical scenario
A client discovers an interface successfully but a newly added method returns the code on an older server, so it falls back to the previous transfer path.
A regression test should force the relevant precondition, assert native outputs, fix only that condition, and confirm the expected neighboring result.
Difference from related HRESULTs
E_NOINTERFACE means the interface itself cannot be obtained; it means the method was reached but its operation is absent.
References
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