Copying a Predefined Object Can Increase Complexity

You might make a copy of an object in the belief that doing so will reduce problems during an upgrade. The assumption is that if the business component is named My Account, then the Application Upgrader will leave it alone during the upgrade, resulting in no problems after the upgrade. This assumption is misleading. The problems you might encounter with an upgraded configuration that contains a copied object might be more complex to solve than the problems that reusing a predefined object causes. It is easier to examine your Siebel application after an upgrade and remove various new controls and list columns from a predefined applet than it is to examine each custom business component and applet to identify the fields, joins, multi-value links, and so on, that you must troubleshoot.