The official VM procedure (GET + PUT) works under other systems as well.
You can also delete/edit the file, then delete the DBINDEX file, and it
will work to the same extent as it did on VM (and is equally
unsupported). This messes with the web archive interface, so you then
need to do the equivalent of deleting the DBINDEX: remove all the INDxxx
files in the web archive subdirectory for the list, then restart
LISTSERV.
Eric