Item Relationships Tab Current Status attribute

I built an application using the Agile APIs to load SolidWorks files, Items and BOM legacy, but for some reason, some item/design publish process failed, regardless the fact that the app created both part and design, and also uploaded the file. Trying to fix these problems, I figured out that there is an attribute, on Item Relationships tab, called Current Status that shows me when the app failed. Tipicaly the attribute value is Unassigned and Assigned, for not published and published designs, respectively.  My plan is query for unassigned items, that have designs with files, and then start figuring out