If I don't select DECwindows Motif, then OpenVMS installs just fine. I guess there may be something wrong with the Motif PCSI package. Fortunately, I have no need for it to be installed, so I'll redo the installation without it and get a clean install going. I've succesfully installed ovms 8.3 w/ DECwindows Motif from two different ISO images. All works fine for me.