Formula to clear child fields when parent changes when using Conditional Value Lists

[JustinC]

Hi -

I had this formula for a while, but can't find it anywhere.

I have a 3-level conditional value list Type > Category > Subject, say I select the type, category and subject, then I go and change Type, the category and subject remains there, but is no longer correct b/c I changed the original top-level setting. Can someone please point me in the formula to remove the Category field when the Type field is changed, or the Subject field when the Category or Subject is changed. I thought it was an Evaluate, but it appears I am wrong.

THANKS so much, Justin

[comment]

http://fmforums.com/forum/showpost.php?post/346499/