What does HRESULT 0x00030205 (STG_S_CONSOLIDATIONFAILED) mean?

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The commit succeeded, but compound-file consolidation failed internally.

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STG_S_MULTIPLEOPENS	STG_S_CANNOTCONSOLIDATE

STG_S_CONSOLIDATIONFAILED

Preservation succeeded even though compaction failed

STG_S_CONSOLIDATIONFAILED means the commit itself succeeded. The optional attempt to consolidate the storage failed internally; Microsoft documentation gives memory allocation failure as an example. The file can therefore contain the new committed data while remaining larger or more fragmented than desired.

Do not repeat the transaction blindly. Replaying application changes after a successful commit can duplicate logical updates.

Diagnostic checklist

Confirm that STGC_CONSOLIDATE was requested and preserve the exact HRESULT.
Record memory pressure, temporary-storage availability, file size, and free disk space.
Reopen and validate the committed storage before scheduling a later maintenance consolidation.
Distinguish this code from STG_S_CANNOTCONSOLIDATE, which identifies an unsuitable mode or transaction level.

References

IStorage::Commit · Microsoft COM storage HRESULTs · Microsoft Compound File Binary format

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