>   I-SALES       LOG95111.TXT    LOG OWN       20,098 2000-06-28=20

LISTSERV thinks that this is a valid archive file but it isn't named
properly, and that's why the web interface fails to open it.  The
only reason it shows up in the INDEX output is because the filetype
fits the pattern LOG* .  The only acceptable filetypes are

LOGyy          for yearly logs
LOGyymm        for monthly logs
LOGyymmw       for weekly logs

For completeness, types that are valid for LISTSERV but not supported
by the web interface (as documented) are

LOGn           for "separate" logs
LOG            for "single" logs

Nathan