What does HRESULT 0xC0AA0210 (E_IMAPI_RECORDER_LOCKED) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: the optical recorder is held for exclusive access and the current operation cannot use it.

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E_IMAPI_RECORDER_MEDIA_SPEED_MISMATCH	E_IMAPI_RECORDER_CLIENT_NAME_IS_NOT_VALID

E_IMAPI_RECORDER_LOCKED

IMAPI exposes explicit recorder locking through AcquireExclusiveAccess. Each acquisition increments a lock count, and ReleaseExclusiveAccess decrements it; the device is available to other clients only after the count reaches zero. Microsoft recommends querying ExclusiveAccessOwner when this HRESULT occurs.

Identify the lock owner and balance acquisition/release calls

Read ExclusiveAccessOwner at the time of failure and log it.
Audit every successful AcquireExclusiveAccess path for a corresponding release, including exceptions and cancellations.
Do not assume another process owns the lock; nested acquisitions by the same application can leave a nonzero lock count.

This is distinct from E_IMAPI_ERASE_RECORDER_IN_USE, which concerns changing the recorder property while the erase object uses it. Here the recorder device itself is exclusively locked. Killing unrelated applications or changing the disc is not a precise fix until the reported owner and lock lifecycle are known.

AcquireExclusiveAccess · ExclusiveAccessOwner · ReleaseExclusiveAccess

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