VMS Help V73 Features, Programming Features, New Process Dump Tools (Alpha), Forcing a Process Dump  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    You can force a process dump with the DCL command
    SET PROCESS/DUMP=NOW process-spec. This command causes the
    contents of the address space occupied by process-spec to be
    written immediately to the file named image-name.DMP in the
    current directory (image-name is the same as the file name).

    For more information about the DCL SET PROCESS/DUMP command,
    refer to the OpenVMS DCL Dictionary: N-Z.