[daip] Problem in CALIB

[Poonam Chandra]

Hi,
I am analysing a VLA continuum D array data. I am at the stage of 
running CALIB. I could run CALIB successfully on the flux calibrator. 
However, it gives error while running the phase calibrator. I check the 
data. It looks okay to me. Where I am going wrong?

Below are the CALIB messages on flux calibrator (3C286) and phase 
calibrator (0854+201) respectively.

For flux calibrator:
sasha.> CALIB1: Task CALIB  (release of 31DEC07) begins
sasha.> CALIB1: CALIB USING 20070301     . X BAND .   1 DISK=  1 USID=2559
sasha.> CALIB1: UVGET: Using flag table version   1 to edit data
sasha.> CALIB1: Selecting and editing the data
sasha.> CALIB1: Doing self-cal mode with CC model
sasha.> CALIB1: SETGDS: imaging done with reprojected tangent point(s)
sasha.> CALIB1: FACSET: source model will be scaled to  5.216 Jy
sasha.> CALIB1: FACSET: 5.280510 Jy found from 194 components
sasha.> CALIB1: FACSET: scaling factor set to  9.87750E-01
sasha.> CALIB1: QINIT: did a GET  of    1280 Kwords, OFF       -341120829
sasha.> CALIB1: VISDFT: Begin DFT component division
sasha.> CALIB1: VISDFT: Model components of type Point
sasha.> CALIB1: I Polarization model processed
sasha.> CALIB1: Model computation is    90 percent complete
sasha.> CALIB1: FACSET: source model will be scaled to  5.195 Jy
sasha.> CALIB1: FACSET: 5.280510 Jy found from 194 components
sasha.> CALIB1: FACSET: scaling factor set to  9.83743E-01
sasha.> CALIB1: VISDFT: Begin DFT component division
sasha.> CALIB1: I Polarization model processed
sasha.> CALIB1: Field    1 used     194 CCs
sasha.> CALIB1: Determining solutions using amp-scalar averaging
sasha.> CALIB1: Writing SN table    1
sasha.> CALIB1: RPOL, IF= 1 The average gain over these antennas is  
3.153E+00
sasha.> CALIB1: RPOL, IF= 2 The average gain over these antennas is  
3.127E+00
sasha.> CALIB1: LPOL, IF= 1 The average gain over these antennas is  
3.357E+00
sasha.> CALIB1: LPOL, IF= 2 The average gain over these antennas is  
3.117E+00
sasha.> CALIB1: Found           98 good solutions
sasha.> CALIB1: Failed on        2 solutions
sasha.> CALIB1: Average closure rms =  0.0015 +-  0.0001
sasha.> CALIB1: Fraction of times having data >  2.5 rms from solution
sasha.> CALIB1: 0.25000 of the times had  2 -  4 percent outside  2.5 
times rms
sasha.> CALIB1: 0.75000 of the times had  4 -  6 percent outside  2.5 
times rms
sasha.> CALIB1: Appears to have ended successfully
sasha.> CALIB1: sasha        31DEC07 TST: Cpu=       0.1  Real=       0

For phase calibrator:
sasha.> CALIB1: Task CALIB  (release of 31DEC07) begins
sasha.> CALIB1: CALIB USING 20070301     . X BAND .   1 DISK=  1 USID=2559
sasha.> CALIB1: UVGET: Using flag table version   1 to edit data
sasha.> CALIB1: Selecting and editing the data
sasha.> CALIB1: Doing cal transfer mode with point model for each source
sasha.> CALIB1: This is not self-calibration
sasha.> CALIB1: Dividing data by source flux densities
sasha.> CALIB1: Determining solutions using amp-scalar averaging
sasha.> CALIB1: Writing SN table    2
sasha.> CALIB1: RPOL, IF= 1 The average gain over these antennas is  
0.000E+00
sasha.> CALIB1: RPOL, IF= 2 The average gain over these antennas is  
0.000E+00
sasha.> CALIB1: LPOL, IF= 1 The average gain over these antennas is  
0.000E+00
sasha.> CALIB1: LPOL, IF= 2 The average gain over these antennas is  
0.000E+00
sasha.> CALIB1: ERROR: NO VALID SOLUTIONS FOUND
sasha.> CALIB1: Purports to die of UNNATURAL causes
sasha.> CALIB1: sasha        31DEC07 TST: Cpu=       0.0  Real=       0

Thanks
Poonam