[daip] AIPS help

[Eric Greisen]

Xingying Liu wrote:
> Hello! 
> 
> I find something confusing when using the Y2K benchmark in my desktop and really need your help. 
> 
> Since I am using my desktop, I don't have a tape. So how should I set up the value of DDISK, TDISK, IOTAPE and Y2KDISK? 
> 
> Now I set the value of Y2KDISK to be 'FITS', where FITS=/home/miao/Y2K, an area in my disk. And then I put my Y2KSUVDATA into this folder and run, but the file still cannot be found by AIPS.
>  
> The output is like this:
> AIPS 1: * Read/Write the input visibility dataset:
> AIPS 1: GET Y2K000RW
> AIPS 1: Y2KPROC
> AIPS 1: Limited to    files matching name parms DY2KS       .UVDATA.   0
> AIPS 1: Destroy all files for user  400 disks  1- 1?   enter YES or NO
> AIPS 1: Disk Volume name                Total Full     Free Timd Access
> AIPS 1:  #                             Mbytes    %   Mbytes days
> AIPS 1:  1  <e/miao/DATA/LOCALHOST_1    66822   46    34349  365 Alluser
> AIPS 1: ZTPOPN: DISK DEVICE = FITS:Y2KSUVDATA1 NOT FOUND
> AIPS 1: TAPIO: ERROR   2 OPENING FILE
> AIPS 1: ALSO COULD NOT OPEN FITS:Y2KSUVDATA
> AIPS 1: INVALID TAPE
> 
> The input is like this:
> AIPS 1:                   Input variables
> AIPS 1: TCODE      'READ'                  INIT,TEST,READ, or WRIT
> AIPS 1: TMODE      'T'                     T or M
> AIPS 1: TMASK        63                    test selection bit mask
> AIPS 1: Y2KSIZE    'SMALL'                 SMALL,MEDIUM,LARGE test
> AIPS 1: DDISK         1                    Disk drive #: master UVDATA
> AIPS 1: MDISK         1                    Disk drive #: other masters
> AIPS 1: TDISK         1                    Disk drive #: test files
> AIPS 1: IOTAPE        1                    Input/output tape drive #.
> AIPS 1: Y2KDISK    'FITS'                  Disk area for READ and WRIT
> AIPS 1: EDGSKP        0                    Pixels to skip at edges
> AIPS 1: TERSE         0                    > 0 => reduced output
> AIPS 1: OUTPRINT   ' '

This is a but curious.  Is it possible that the environment variable 
FITS is being changed by your START_AIPS procedure.  We do that here so 
that each computer has its own FITS area.  I think that more globally, 
FITS is set to $AIPS_ROOT/FITS.  So try setting a new variable e.g.
     setenv MYY2K /home/miao/Y2K
and then Y2KDISK='MYY2K'.  The variable FITS is too global to be trusted.

Eric Greisen