[daip] bug in CLCAL?

[Amy Mioduszewski]

I have a phase referencing data set where the target source
is sandwiched between 2 calibrator sources:
cal1, target, cal2, target, cal1.  Now since the positions of the
calibrators are not accurate I can only use one calibrator for
the interpolation over the target.  There is approximately 7 minutes
between scans on the same calibrator so I wanted to use CUTTOFF in
CLCAL and see if it helps to interpolate over a shorter time range.
When I set CUTOFF=2 (i.e. 2 minutes, I've tried CUTOFF=3 as well),
it only interpolates for the few scans and flags most of the data
including whole antennas and IFs .  The solutions for the time
interval where this works do not seem to be closer together.  Am
I misunderstanding what CUTOFF is supposed to do?

CLCAL inputs:
 
AIPS 1: CLCAL     Task to manage SN and CL calibration tables
AIPS 1: Adverbs     Values                 Comments
AIPS 1: ----------------------------------------------------------------
AIPS 1: INNAME     'BR058B      '          Input UV file name (name)
AIPS 1: INCLASS    '18 CM '                Input UV file name (class)
AIPS 1: INSEQ         1                    Input UV file name (seq. #)
AIPS 1: INDISK        2                    Input UV file disk unit #
AIPS 1: SOURCES    'CICAM           '      Source list to calibrate
AIPS 1:            *rest ' '
AIPS 1: SOUCODE    '    '                  Source "Cal codes"
AIPS 1: CALSOUR    'J0419+5722      '      Cal sources for calibration
AIPS 1:            *rest ' '
AIPS 1: QUAL         -1                    Source qualifier -1=>all
AIPS 1: CALCODE    '    '                  Calibrator code '    '=>all
AIPS 1: TIMERANG   *all 0                  Time range to calibrate
AIPS 1: SUBARRAY      0                    Subarray, 0=>all,
AIPS 1: ANTENNAS   *all 0                  Antennas selected, 0=> all
AIPS 1: SELBAND      -1                    Bandwidth to select (kHz)
AIPS 1: SELFREQ      -1                    Frequency to select (MHz)
AIPS 1: FREQID       -1                    Freq. ID to select.
AIPS 1: OPCODE     '    '                  Operation 'MERG','CALI',
AIPS 1:                                    'SMOO','CALP'; ' ' => 'CALI'
AIPS 1: INTERPOL   'SIMP'                  Interpolation function,
AIPS 1:                                    choices are:
AIPS 1:                                    '2PT','SIMP','AMBG','CUBE',
AIPS 1:                                    'SELF','POLY','MWF','BOX'
AIPS 1:                                    see HELP for more details.
AIPS 1: INTPARM    *all 0                  Interpolation parameters
AIPS 1: CUTOFF        2                    Interpolation limit in
AIPS 1:                                    time (min); 0=> no limit.
AIPS 1: SMOTYPE    '    '                  Data to smooth
AIPS 1: SNVER         5                    Input SN table, 0=>all.
AIPS 1: GAINVER       5                    Input Cal table 0=>1
AIPS 1: GAINUSE      15                    Output CAL table 0=>2
AIPS 1: REFANT        2                    Reference antenna 0=>pick.
AIPS 1: BADDISK    *all 0                  Disks to avoid for scratch

CLCAL output:

CLCAL1: Task CLCAL  (release of 31DEC01) begins
CLCAL1: You are using a non-standard program
CLCAL1: Using interpolation mode SIMP
CLCAL1: Processing SN table    5
CLCAL1: WARNING: SN table    5 has already been applied
CLCAL1: Adjusting solutions to a common reference antenna =  2
CLCAL1: CALREF: CAN NOT RELATE ANTENNA  1 TO  2 IN SUBARRAY  1
CLCAL1: CALREF: CAN NOT RELATE ANTENNA  1 TO  2 IN SUBARRAY  1
CLCAL1: CALREF: CAN NOT RELATE ANTENNA  1 TO  2 IN SUBARRAY  1
CLCAL1: CALREF: CAN NOT RELATE ANTENNA  1 TO  2 IN SUBARRAY  1
CLCAL1: CALREF: CAN NOT RELATE ANTENNA  1 TO  2 IN SUBARRAY  1
CLCAL1: CALREF: CAN NOT RELATE ANTENNA  1 TO  2 IN SUBARRAY  1
CLCAL1: Some solutions were not adjusted to the common
CLCAL1: reference antenna. This may be because one or more
CLCAL1: antennas were not used. Check your data before
CLCAL1: proceeding.
CLCAL1: SN2CL: Applying SN tables to CL table   5, writing CL table 15
CLCAL1: Appears to have ended successfully 

Amy