XOV allows you to cross over from a previous session. After you use EDXOV to edit crossovers, use XOV to transfer the player names and scores in multi session events. See Multi-session games for details.
You will see the message "Report of missing names (holes) in the current game file:" and possibly a list of locations (section.table.direction) that are empty as a result of the cross over. This may be caused by errors in cross over assignments in the previous session or pairs that were "99ed" (one session) or the second session game is larger. If there are errors, correct any of them in the previous session game file using EDXOV, return to the second session game file and cross over again. Enter the names for any players that participate only in the second session.