Before you can work with the demo application, you need to initialize the number sequences using the following steps:
Go to AOT and run the job named InitializeCVRNumberReference.
When the job is finished, navigate to Contoso Video Rental | Setup | Parameters.
Then, select a number sequence for each number sequence reference.
You can create your own number sequences first by right clicking on the Number sequence code field and choosing View Details. Create your number sequences there and then use them on the parameters form.