sqlerr -750 invalid distribution format

Dear all, OS: Solaris 2.7 IDS: 7.31.UD5 Problem: SQL statement error number -750. Invalid distribution format found for sn I have some programs always hitting the sql error -750 on those heavyly used tables and it was just happen on few weeks back. The programs were never been changed at all and the only changes was the load of transactions on those heavyly used tables were increased at least 20-30% due to the business grow. I was encountered the same problem on version 7.31.UC2 as well. I have tried to run the update statistics with the following format on those heavyly used tables on daily basic. However, the problem was still persisted. update statistics low for table <tabname> dropdistributions; update statistics medium for table <tabname>distributions only; Is there other method to resolve the error?? Any recommendation and advise are highly appreciated. Thanks & regards, Miyaki __________________________________ Do you Yahoo!? Yahoo! SiteBuilder - Free, easy-to-use web site design software http://sitebuilder.yahoo.com