Description: If you have custom kernel scripts that store data in a model database, you should verify that the model database is compatible with your scripts before allowing the user to interact with the model database. For example, if you have two different custom kernel applications that are not designed to work independently on the same model database, you should prevent a model database that was created with the first application from being operated on by the second application. You use the appData object and the verifyMdb method to determine if a model database needs to be upgraded. The customKernel module has changed the way that it handles the appData object and verifyMdb method. You must install your custom appData object by using the setAppData method, and you must install your verifyMdb method by using the setVerifyMdb method.