Apex 4 Cascading LOV's how to set a child LOV back to null return value

Hi,
My problem is I am using the new Dynamic Actions to implement Cascading LOV functionality in Apex 4 which means not having to submit the page to update child LOVs after parent LOV changes.
What I am finding is that when you change the parent LOV value then the child LOV (which has a null return value) is not defaulting to the null return value (in my case no selection should return -1) if its list is filtered to a different set of values which doesnt have a valid selection. The child LOV is left without a selection when I need it to default back to the null return value (-1, representing all values).
Also I was hoping to do this before the page is submitted so the filtering down the hierarchy of LOVs will work where the child is null (-1, meaning all values) and in turn its child LOV(s) will filter also from the null child value.
Any help would be much appreciated.
Thanks

Hi 804641,
I'm not sure if I get your problem and I tried to reproduce it.
http://apex.oracle.com/pls/apex/f?p=2672:6 is my example with a cascading LOV where I have also defined a dynamic action which fires when P6_EMPNO changes and it shows the current selection.
Maybe it helps if you setup an example on apex.oracle.com and provide the workspace/user/pwd so that I can have a look. I'm also not sure about your sentence "using the new Dynamic Actions to implement Cascading LOV functionality", because dynamic actions are not needed for cascading LOVs. It's a feature of the item types themselves where you just have to set the "Cascading LOV Parent Item(s)" attribute.
Regards
Patrick
My Blog: http://www.inside-oracle-apex.com
APEX 4.0 Plug-Ins: http://apex.oracle.com/plugins
Twitter: http://www.twitter.com/patrickwolf

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