[daip] AIPS error in CALIB

[Eric Greisen]

Poonam Chandra writes:
 > Hi,
 > 
 > I am running CALIB on an X band VLA data. When I run CALIB on 3C48, it 
 > gives error but still creates an SN table. CALIB runs smoothly for the 
 > phase calibrator. I have never come across such an error. Please let me 
 > know whats wrong.
 > The error is the following:
 > 
 > gkar  > CALIB1: FACSET: source model will be scaled to  3.145 Jy
 > gkar  > CALIB1: FACSET: 3.429181 Jy found from 300 components
 > gkar  > CALIB1: FACSET: scaling factor set to  9.17087E-01
 > gkar  > CALIB1: VISDFT: Begin DFT component division
 > gkar  > CALIB1: I Polarization model processed
 > gkar  > CALIB1: Field    1 used     300 CCs
 > gkar  > CALIB1: Determining solutions using amp-scalar averaging
 > gkar  > CALIB1: Writing SN table    1
 > gkar  > CALIB1: TABIO: BAD LRNO =        11 LIMIT        10
 > gkar  > CALIB1: TABNDX: TABIO ERROR  2
 > gkar  > CALIB1: Purports to die of UNNATURAL causes
 > gkar  > CALIB1: gkar 31DEC08 TST: Cpu=      0.4  Real=      0  IO=         7
 > 

Take a look at the LISTR 'SCAN' output.  Are the times many many days
plus the hours minutes seconds?  This can happen when FILLM is given a
REFDATE or when FILLM is run on multiple files simultaneously with
data that are many days apart.  The recording of time in floating
point days is inaccurate if there are many days and this is the
circumstance in which this error seems to arise.

Eric Greisen