Chad,

If they're SPT cursor than it's unlikely that indexes got corrupted. I would try to rewrite UPDATE statement this way

UPDATE c_Store SET ;
		c_Store.nMin = c_MinMax.nMin ;
	FROM c_Store ;
		JOIN c_MinMax WITH (Buffering = .t.) ;
			ON c_Store.cGroup = c_MinMax.cGroup ;
	WHERE ;	
		c_Store.lLock = .f. ;
		AND c_MinMax.nMin > -1

>
>I guess that's technically possible, but it seems highly unlikely as c_Store and c_MinMax are both cursors created from SPT. But, there are indeed indexes placed on them after creation, so I'll look into that.
>