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WINBIO_E_ENROLLMENT_IN_PROGRESS
WINBIO_E_ENROLLMENT_IN_PROGRESS means the biometric unit already has an active enrollment transaction. WBF prevents simultaneous enrollment flows from modifying the same template state.
What to check for WINBIO_E_ENROLLMENT_IN_PROGRESS
- Complete or discard the existing enrollment before starting another one.
- Ensure the application serializes enrollment requests per biometric unit.
- After an interrupted UI flow, close or reset the session cleanly so a stale enrollment is not left active.
Microsoft: Windows Biometric Framework client error codes
Diagnostic discriminator: Check the biometric session enrollment state before starting another enrollment sequence. This status means an enrollment transaction is already active, not that the sensor is generally busy.
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