# A3DCallbackReportWarning

type `A3DCallbackReportWarning`

  A callback function the library invokes to report warnings.

  The returned message begins with a unique error code, which you can use for localization. In some cases, the second argument provides additional information about the warning. These messages are English only.

  If this callback function is not provided, the library sends warning messages to the null device.

  > 2.0

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