Using Discovery Accelerator you find an item that is failing to export using the export or production features in Discovery Accelerator
So now you need to prove the item exists in the archive.
There are two ways to do this
1. Search in EV and dig through mounts of results to fine the one item
2. Find the item Saveset ID and then search in EV by Saveset
Option one make little sense as the search will be fast but unless your search is very, very targetted chances are you will get back hundreds if not thousands of results which will take you hours to look through to find the one item you need
Option two is the easier way to go as it will get you the saveset and then you just search for the saveset or in the case of a Centera you can extract the saveset direct from the Centera device. (see https://www-secure.symantec.com/connect/blogs/how-find-clip-id-saveset)
/* Run this query against the Discovery Accelerator database to find the saveset id. Note: The discovereditemid is
found in Review Items for the case */
where discovereditemid = '10624077'