<p>A unique case-sensitive string used to ensure the request to create the calculation is idempotent (executes only once). If another <code>StartCalculationExecutionRequest</code> is received, the same response is returned and another calculation is not created. If a parameter has changed, an error is returned.</p> <important> <p>This token is listed as not required because Amazon Web Services SDKs (for example the Amazon Web Services SDK for Java) auto-generate the token for users. If you are not using the Amazon Web Services SDK or the Amazon Web Services CLI, you must provide this token or the action will fail.</p> </important>

<p> <code>CREATING</code> - The calculation is in the process of being created.</p> <p> <code>CREATED</code> - The calculation has been created and is ready to run.</p> <p> <code>QUEUED</code> - The calculation has been queued for processing.</p> <p> <code>RUNNING</code> - The calculation is running.</p> <p> <code>CANCELING</code> - A request to cancel the calculation has been received and the system is working to stop it.</p> <p> <code>CANCELED</code> - The calculation is no longer running as the result of a cancel request.</p> <p> <code>COMPLETED</code> - The calculation has completed without error.</p> <p> <code>FAILED</code> - The calculation failed and is no longer running.</p>