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Oracle Applications:Forms personalization Part 3
Most significantly, this may interfere with, or be overridden by, base product code; any change user make might interfere with the normal operation of the form. This can manifest itself in several ways, such as:
- User may make a personalization but it does not take effect, because there is code in the form that overrides it. In some cases user may be able to perform user personalization by moving the Trigger Event to a 'lower' level, such as block or item-level.
- User personalization may simply produce the wrong result, because user change interacted with the base code in unexpected and untested ways. At best this error will occur immediately upon the personalization being applied; at worst it could affect some later processing which does not appear to be directly related to the object or event.
- In extreme cases, user changes may prevent the form from running at all, making it difficult to open the Personalization screen to remove the offending personalization unless user turn off Custom Code. Because of this, it is critical that any change be thoroughly tested in a Test environment. See the 'Troubleshooting, Support, and Upgrade considerations' section later in this chapter for more information.
 Use of the Apply Now button does not always work if dependent on the results of another action.