This question is answered by http://www.lsoft.com/manuals/lsv-faq.stm#5.11 Although the problem covered by the FAQ is slightly different than the one you are reporting, the resolution is identical--you delete the listname.ind* files and listname.html file and let LISTSERV rebuild them (GET and PUT of the list header will do this, or if you have many lists with this problem, just stop and restart LISTSERV after deleting the files noted above). FWIW I'm getting ready to update this particular FAQ answer since I notice it doesn't specifically cover this problem. Nathan