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STG_E_NOTFILEBASEDSTORAGE
STG_E_NOTFILEBASEDSTORAGE: diagnose the owning boundary
STG_E_NOTFILEBASEDSTORAGE (0x80030107) is documented as Illegal operation called on non-file based storage. Treat that wording as the specific structured-storage backing type boundary; it is more useful than a generic “component failed” label.
Evidence that matters
Record the IStorage implementation and operation that requires file-backed storage. Use a file-backed storage object or choose an API supported by the current implementation.
Interpretation and verification
Keep the affected object and caller identity stable while changing only the rejected prerequisite. The correction is proven when the original operation crosses this boundary with the intended state or output. If a different HRESULT appears afterward, preserve it as a separate later-stage result rather than folding it back into STG_E_NOTFILEBASEDSTORAGE.
Technical references
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