Error Message During Delete Process

Hello,

Everyone has been so helpful in the past, I thought I would ask about another issue I am having.

While trying to delete some items through the "Delete and Change Items" Module I receive the following Error Message for each of the items:

"No Action - Extended Cost Must Be Zero"

I am confused by this message as the items in question have no history or quantity on hand.  They are all dated beyond the "Purge History" date I have already performed prior to attempting this Delete Session.  Has anyone ran into this before and if so, would you please advise me how to correct it so I may delete these items?

That's, in advance, for any assistance,
Martin