Can I use DECwindows 1.2-* on OpenVMS V7.3-2 or later?
The short answer is no. OpenVMS Alpha V7.3-2 only supports DECwindows Motif V1.3 and later. If you require DECwindows V1.2-6 or earlier, then you are limited to operations on OpenVMS Alpha V7.3-1 and earlier releases. The central technical reason involves depdendencies among the parts of the X11 subsystem that are delivered with the base OpenVMS operating system including the X Windows display server and the transport images, and 11-17 DECwindows the parts of the DECwindows product that are delivered within the DECwindows installation kits including the client libraries and the DECwindows applications. DECwindows V1.3 and later made substantial changes to the transport layer, and these required corresponding changes to both the associated client and server code. OpenVMS Alpha V7.3-2 includes the server and transport with the V1.3 modifications. These changes were in support of the upgrade of Xlib from X11R5 to X11R6.6, and transport-level changes associated with support of the Kerberos
