How to catch an error in APEX 4.2

Hi,
I have 2 regions The 2. Region is to be displayed only if there is a special request built by column ID is not null and there was no error caught from validation in the region before (= Region 1)
How can I cath the error and make a condition for displaying the Region 2?
Thank you for your help.
Regards
Siegwin.

Dynamic actions.
Create a dynamic action on change of the column you want to validate - apply whatever condition you need then have a true/false action to show/hide your chosen region.

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Message was edited by: Spring Tang
inital
Message was edited by: Spring Tang
detailed message output
Message was edited by: Spring Tang
fault message type

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