It means  undetermined error. In  practice, since LSVDBS has  been pretty
stable and has no known bug, it means that someone linked R/W to the disk
where the archives are stored, XEDITed a  couple of them to add or remove
some stuff,  and didn't bother to  tell LISTSERV to refresh  its database
index. For performance reasons, LISTSERV  doesn't try to detect this kind
of things which  are, of course, not allowed. If  you have archives which
can be  searched through  the database functions,  they must  be modified
using the GET and PUT functions, which refresh the index as necessary.
 
  Eric