> For the complete documentation index, see [llms.txt](https://docs.sentiance.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.sentiance.com/important-topics/sdk/api-reference/android/initializationresult/initializationfailurereason.md).

# InitializationFailureReason

Represents the initialiation failure.

| **UNSUPPORTED\_OS\_VERSION**       | The SDK does not support the existing OS version.                                                                                                                                                                                                                      |
| ---------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **REINITIALIZATION\_NOT\_ALLOWED** | Reinitialization is not allowed while a Sentiance user exists, unless done across app restarts or after an SDK [reset](/important-topics/sdk/api-reference/android/sentiance.md#reset).                                                                                |
| **EXCEPTION\_OR\_ERROR**           | An exception or an error occurred during initialization. See [InitializationResult#getThrowable()](/important-topics/sdk/api-reference/android/initializationresult.md#getthrowable).                                                                                  |
| **SDK\_RESET\_IN\_PROGRESS**       | Cannot initialize the SDK while it's being reset. Wait for the the reset operation to complete first.                                                                                                                                                                  |
| **APP\_INSTABILITY\_DETECTED**     | <p>The SDK detected app instability, so initialization was aborted.</p><p>All subsequent initialization attempts are blocked until the application is restarted.</p><p>This safety mechanism helps prevent additional instability and reduces the risk of crashes.</p> |


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