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You can use the Simulink® Upgrade Advisor to check your model for:
SimEvents® blocks from releases prior to R2011b (legacy blocks).
Implicit event duplication caused by multifiring in SimEvents blocks.
Run Upgrade Advisor Checks
Run the Upgrade Advisor. In the Simulink Editor, select Analysis > Model Advisor > Upgrade Advisor.
In the left pane, select the check box next to the SimEvents check that you want to run.
In the right pane, click Run This Check. When the check is completed, the right pane displays the results.
Check model and local libraries for legacy SimEvents blocks checks your model for SimEvents blocks from releases before R2011b (legacy blocks). If the Upgrade Advisor detects legacy blocks in your model, the Recommended Action section of the results pane includes a link to Migration Using seupdate in the SimEvents documentation. If you click the link, you can learn about how to use the seupdate function to migrate your model to the latest version of the SimEvents software.
Check for implicit event duplication caused by SimEvents blocks checks the configuration parameters of your model for the status of the Prevent duplicate events on multiport blocks and branched signals parameter. When you enable this parameter, the software eliminates potentially undesirable event duplication caused by certain SimEvents model configurations. If Prevent duplicate events on multiport blocks and branched signals is not enabled in your model, the lower portion of the results pane displays a button, Modify Settings, that allows you to directly enable the parameter.