Hi Rebecca and Bob Thanks, and yes, I do take the point about there needing to be a 4XX in an authority with an old form to force a change in bib headings. Though just out of interest and as an experiment, I made a manual change yesterday to this LCSH authority: MARC Leader #####cz 22#####n 4500 y 001 sh 85023499 y 003 DLC y 005 20060817132438.0 y 008 060712i| anannbabn |a ana y 010 sh 85023499 y 040 DLC|cDLC|dDLC y 053 0 HV1596.2|bHV1596.5 g 150 Blind children p 450 Blindness in children|xPatients p 450 |wnne|aChildren, Blind q 550 |wg|aChildren with visual disabilities and for good measure I suppressed and unsuppressed it at the same time. The change I made was to swap the 150 around with the 2nd 450, so our authority now has Children, Blind as main heading. AACP should have run during the night and I expected all our bib headings (we have six) to have changed - but they haven't. I don't understand why not. We definitely have AACP switched on. But in a way my fundamental question is -- since so many authorities, names being principal problem, don't have old form in 4XX, what can I do to avoid having to check all the reports from beginning to end and make manual changes? If AACP isn't going to do the job, what use is it to me? And those reports can be pretty massive. Cheers Paul This message has been scanned for viruses by BlackSpider MailControl - www.blackspider.com