Is the portal either sorted or filtered? Is the relationship to the portal records sorted? WIll the selection from the value list affect either the filter or sort order(s)?
If the files went through a crash, you might consider using the Recover tool on them just to Rebuild the Indices, which, of course, control the relationships. The Reindexing of files via the Recover tool IS SAFE to use with files which continue to be used, unlike some other Recover functions.