[daip] [!6513]: aips - UVAVG fails to average dataset in time

[Eskil Varenius]

Eskil Varenius updated #6513
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UVAVG fails to average dataset in time
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           Ticket ID: 6513
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/6513
           Full Name: Eskil Varenius
               Email: varenius at chalmers.se
             Creator: User
          Department: AIPS Data Processing
       Staff (Owner): -- Unassigned --
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template Group: Default
             Created: 28 April 2015 08:37 AM
             Updated: 28 April 2015 08:37 AM
                 Due: 30 April 2015 08:37 AM (2d 0h 0m)
      Resolution Due: 06 May 2015 08:37 AM (8d 0h 0m)



Dear support,
I'm trying to average a dataset in time using UVAVG and it fails. This file was created in a somewhat unusual manner but other tasks (e.g. FRING) work fine so I would be grateful for any assistance on why UVAVG does not like the file. I'm running latest AIPS version (31DEC15) with Midnight job active. 

The file consists of LOFAR data which was converted to UVFITS and divided into IFs using MORIF to run FRING. Running AVSPC to average in frequency works fine, but UVAVG protests. Trying with default settings, setting yinc = 9.5 (to try to average to 10s) and zinc = 5 (the data was pre-averaged to 5s) I get the following output:
UVAVG2: Create 3079SPTEST  .UVAVG .   1 (UV)  on disk  1  cno   48
UVAVG2: ANREFM: NO ANTENNA OR ARRAY RECOGNIZED
UVAVG2: CATDIR: CAN'T WRITE ON CATNO     35 NONZERO STATUS
UVAVG2: ANREFM: ERROR   7 CHANGING WRIT STATUS
UVAVG2: ANTINI: ERROR  7 CORRECTING AN FORMAT, CONTINUING
UVAVG2: ZOPEN: LUN =  27 ALREADY OPENED IN FTAB
UVAVG2: TABINI: I/O ERROR FROM ISTAB ON AN
UVAVG2: ANINI: ERROR   3 FROM TABINI OPCODE = READ
UVAVG2: ANINI: ERROR   3 INITIALIZING ANTENNA TABLE FOR READ
UVAVG2: ZCLOSE: INVALID LUN =  0
UVAVG2: UVAVDO: Parameter MXINDX too small ( 1540 )
UVAVG2: UVAVUV: UVAVDO ERROR 10
UVAVG2: Destroyed  1 extension files of type NX
UVAVG2: Destroyed UV image file: catno=     48 disk= 1
UVAVG2: Purports to die of UNNATURAL causes
UVAVG2: dvalin 31DEC15 TST: Cpu=      2.1  Real=      4  IO=        73

I have splitted out a small chunk (10m) of data which you can download as UVFITS to replicate the problem:
https://chalmersuniversity.box.com/s/ej1rzq5ollv79gvfw6wi9hqk6p5da5c4

I'd be grateful to learn about any ideas you may have to the reason of this error.

Best regards,
Eskil

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