[daip] UVFLF -cannot unflag VLBA data

[Robert Mutel]

Hi,
I am trying to use UVFLG to unflag a VLBA antenna which was falsely flagged
during the observation [BM267A, 6 April 08, antenna HN, ellipsoid position
does not match, but doesn't affect data, according to operator log. It
appears that UVFLG was recently modified [July 15] so there might be a new
gremlim.

My UVFLG inputs are

#inp
AIPS 1: UVFLG:  Task to Flag selected UV data on disk.
AIPS 1: Adverbs     Values                 Comments
AIPS 1: ----------------------------------------------------------------
AIPS 1: INNAME     'BM267A'                UV data (name).
AIPS 1: INCLASS    'UVDATA'                UV data (class).
AIPS 1: INSEQ         1                    UV data (seq. #).  0 => high
AIPS 1: INDISK        1                    Disk unit #.  0 => any
AIPS 1: INFILE     *all ' '                Text file name.
AIPS 1: SOURCES    *all ' '                Sources selected/deselected
AIPS 1: SUBARRAY      0                    Subarray number 0=>all.
AIPS 1:                                    Elevation is flagged: 0=>1
AIPS 1: SELBAND      -1                    Bandwidth to flag (kHz)
AIPS 1: SELFREQ      -1                    Frequency to flag (MHz)
AIPS 1: FREQID       -1                    Freq. ID to flag. -1=>all.
AIPS 1:                                    0=> first Freq. ID.
AIPS 1: TIMERANG   *all 0                  Time: start day,hr,min,sec
AIPS 1:                                          stop day,hr,min,sec.
AIPS 1: BCHAN        -1                    First frequency channel
AIPS 1: ECHAN        -1                    Last channel 0=>all
AIPS 1: BIF          -1                    First IF 0=>1
AIPS 1: EIF          -1                    Last IF 0=>all
AIPS 1: ANTENNAS      5           5        Antennas
AIPS 1:               5           5           5           5
AIPS 1:               5           5           5           5
AIPS 1:               5           5           5           5
AIPS 1:               5           5           5           5
AIPS 1:               5           5           5           5
AIPS 1:               5           5           5           5
AIPS 1:               5           5           5           5
AIPS 1:               5           5           5           5
AIPS 1:               5           5           5           5
AIPS 1:               5           5           5           5
AIPS 1:               5           5           5           5
AIPS 1:               5           5           5           5
AIPS 1: BASELINE   *all 0                  Baselines with ANTENNAS
AIPS 1: STOKES     ' '                     Stokes' parameters
AIPS 1: OUTFGVER      2                    Flag table version number
AIPS 1:                                       Used w single-source too
AIPS 1: APARM      *all 0                  1:elevation lower cutoff deg
AIPS 1:                                    2:elevation upper cutoff deg
AIPS 1:                                    3:Factor of suppression of
AIPS 1:                                      spurious fringes caused by
AIPS 1:                                      pulse cal when fringe
AIPS 1:                                      rate close to zero.
AIPS 1:                                      It must be >1
AIPS 1:                                      0 => do not flag due to
AIPS 1:                                        this reason
AIPS 1:                                    4:>0 => Print source, time,
AIPS 1:                                       baseline,  U,V of expected
AIPS 1:                                       zero fringe rate (U=0)
AIPS 1:                                      0 => do not print
AIPS 1: OPCODE     'UFLG'                  'FLAG','UFLG', 'REAS', 'WILD'
AIPS 1: REASON     *all ' '                Reason (24 char.)
AIPS 1: DOHIST       -1                    > 0 -> add to history

According to the help file:
 OPCODE.....Tells whether to flag or unflag the data.
             'FLAG' => flag the data,
             'UFLG' => unflag with adverbs including REASON
                       Note that the adverbs must match the flag or be
                       set to special "ignore this adverb" values.
                       Defaults are not applied for UFLG.

Perhaps one or more adverbs are not set to 'ignore this adverb', but I can't
determine which one(s).
I also tried REASON  '*', no luck. The PRTAB table says REASON = 'Ellipsoid
posn error', which I also tried
without success - anten 5 is still flagged [as determined by, e.g., LISTR
output]

Thanks

Robert
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