HRESULT 0xC0AA0300 (E_IMAPI_LOSS_OF

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: the recorder was not supplied with write data quickly enough to maintain continuous streaming.

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E_IMAPI_RECORDER_INVALID_RESPONSE_FROM_DEVICE	E_IMAPI_UNEXPECTED_RESPONSE_FROM_DEVICE

E_IMAPI_LOSS_OF_STREAMING

E_IMAPI_LOSS_OF_STREAMING is a data-delivery failure during the burn. IDiscFormat2Data::Write synchronously records an IStream, while the write engine and recorder consume data continuously. Microsoft specifically recommends moving source data local, lowering write speed, or enabling a buffer-underrun-free capability when available.

Measure source throughput and the selected write speed

Record current write speed and whether IMAPI adjusted the requested speed.
Identify whether the IStream reads from local storage, a network path, compressed/on-demand data, or another slow producer.
Use progress/buffer telemetry where available and avoid blocking work in callbacks on the write path.

This is not the same as E_IMAPI_UNEXPECTED_RESPONSE_FROM_DEVICE: loss of streaming identifies data starvation. A perfectly compatible disc can still fail if the producer cannot sustain the selected rate. Copying the source locally or reducing speed is diagnostically meaningful because both change the rate relationship between the stream producer and optical writer.

IDiscFormat2Data::Write · SetWriteSpeed · IMAPI return values

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