b4f569c4_ips__Converting_to_Access_2007__Bug
[Comments] UNION queries on attached tables fail after installing Service Pack 2 for Office 2007, though they worked before. Details in http://www.pcreview.co.uk/forums/thread-3803279-1.php [Fixed?] No [Bug] 
"Query too complex" errors in SP2
Microsoft Access tips: Converting to Access 2007
Bug