Losing data on a tabular form when submitting a page with validation errors

I have a window that has a regular HTML form at the top that has several items. Then on the bottom of the page, I have a tabular form where the user can enter multiple rows of information. Unfortunately, when the page is submitted, if there are any validation errors, any changes that were made in the tabular form are lost.
Any suggestions

Fair enough :)
Actually what I was meaning was could I use a collection to repopulate the tabular form when I receive errors. It appears as if it may work. However, I am hitting one snag.
I have created a PL/SQL Process that runs On Submit and Before Computations/Validations. In this process, I have saving the values in the tabular form to a collection.
I was then hoping to create another process that ran after any errors occur. However, it does not appear as if any processes run when the screen redraws after a validation issue. Is there a process that runs after validations when the screen is redrawing? Will I need to do this using javascript?
Thanks

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Losing data on a tabular form when submitting a page with validation errors

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