Override Master Page Item on A Master Page

Hello All,

I'm trying to write a script which includes the equivalent of right clicking a master page in the page pallet and selecting "Override All Master Page Items."

I've tried looping through the .AppliedMaster.PageItems using the Override command as shown below where IPage is .ActiveWindow.ActivePage:

InD.ActiveWindow.ActivePage.AppliedMaster.PageItems(i%).Override IPage

but I'm getting an "Invalid object for this request" error.

Any help is greatly appreciated.