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WINBIO_E_DATABASE_CANT_CLOSE
WINBIO_E_DATABASE_CANT_CLOSE means the storage adapter could not close a database cleanly. This can occur while flushing state, releasing a handle, or finalizing an enrollment transaction.
What to check
- Look for a preceding write, I/O, lock, or connection error; this code is often a follow-up failure.
- Ensure application sessions are closed only after pending biometric operations complete.
- For a vendor adapter, investigate resource cleanup and handle ownership rather than ignoring the close error.
Microsoft: Storage Adapter Functions
Microsoft: Windows Biometric Framework client error codes
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