No fringes at the beginning, problems with setup suspected but the cause has not been found till the end of the fringe finder section of the schedule. Problem turned out to be wrong version of DBBC software on dbbcho, rectified by 21:08 UT.
Further problem with LO setup found during the next fringe check at 23:42 UT. Rectified by 00:11 UT. Fringes confirmed at next fringe finder at 02:04 UT. Consider all data before 00:11 UT a write off.