Using Siebel Tools > Working with Objects >
About Validating Objects
As you modify or create objects, you should also validate their definitions. Validating objects is one of the first things you should do if a configuration change produces a run-time error. Although the validation process can be time consuming, you can continue working in Siebel Tools while the validation is running.
Validation is based on a set of rules that help make sure that your configuration changes are logically consistent with other objects. Validating a parent object validates child objects as well.
There are many rules used to validate objects. The rule that checks for invalid object references is the most important. An invalid object reference occurs when one object (for example, an applet) references another object (for example, a business component) that has been inactivated or deleted. You can review all validation rules in the Validation Options dialog box.