[daip] IMAGR error

[Eric Greisen]

Hanno Spreeuw wrote:
> Hello,
> 
> I am running IMAGR on a dataset with 4 subarrays:
> 
> IMAGR3: OBOXFILE already exists, BOXFILE not copied to it
> IMAGR3: Create 88_89       .IMAGR .   1 (UV)  on disk  1  cno   62
> IMAGR3: Beginning channel    1 through    1 with  1 IFs
> IMAGR3: IMACPY: Copied 11146140 visibilities to be imaged
> IMAGR3: QINIT: did a GET  of      5120 Kwords, OFF   35037482628109
> IMAGR3: UVWAIT: begin finding uniform weights
> IMAGR3: UVWAIT SORT ERROR: ROWS   324   324 OUTSIDE     0   251
> IMAGR3: UVWAIT: ERROR WEIGHTING UV DATA
> IMAGR3: OUNFWT: ERROR IN UNIFORM WEIGHTING OF UVdata work object
> IMAGR3: Deleting UV work file:
> IMAGR3: Destroyed  4 extension files of type AN
> IMAGR3: Destroyed  1 extension files of type FQ
> IMAGR3: Destroyed UV image file: catno=     62 disk= 1
> IMAGR3: Purports to die of UNNATURAL causes
> 
> This is IMH on the dataset:
> 
>  >imh
> AIPS 1: Image=SGRA      (UV)         Filename=88_89       .SPLIT .   3
> AIPS 1: Telescope=VLA                Receiver=VLA
> AIPS 1: Observer=AP168               User #=  143
> AIPS 1: Observ. date=03-DEC-1988     Map date=27-APR-2009
> AIPS 1: # visibilities  11146140     Sort order  TB
> AIPS 1: Rand axes: UU-L-SIN  VV-L-SIN  WW-L-SIN  BASELINE  TIME1
> AIPS 1: ----------------------------------------------------------------
> AIPS 1: Type    Pixels   Coord value     at Pixel     Coord incr   Rotat
> AIPS 1: COMPLEX      3   1.0000000E+00       1.00  1.0000000E+00    0.00
> AIPS 1: STOKES       1  -1.0000000E+00       1.00 -1.0000000E+00    0.00
> AIPS 1: FREQ         1   3.3078125E+08       1.00  1.9531250E+05    0.00
> AIPS 1: IF           1   1.0000000E+00       1.00  1.0000000E+00    0.00
> AIPS 1: RA           1    17 45 40.050       1.00       3600.000    0.00
> AIPS 1: DEC          1   -29 00 28.124       1.00       3600.000    0.00
> AIPS 1: ----------------------------------------------------------------
> AIPS 1: Coordinate equinox 2000.00
> AIPS 1: Rest freq      0.000         Vel type: OPTICAL wrt YOU
> AIPS 1: Alt ref. value  0.00000E+00  wrt pixel   13.00
> AIPS 1: Maximum version number of extension files of type NX is   1
> AIPS 1: Maximum version number of extension files of type FQ is   1
> AIPS 1: Maximum version number of extension files of type HI is   1
> AIPS 1: Maximum version number of extension files of type AN is   4
> AIPS 1: Keyword = 'MAXABSU '  value = -1.000000E+00
> 
> Any idea what this could be?
> 
> Cheers,
> Hanno.
> 
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I have seen an oddity which might explain things - if there is a keyword 
in the uv dataset header called MAXBLINE use PUTHEAD to set its value 
negative.  Then try again

Eric Greisen