[daip] DiFX, AIPS, APCAL and WX table

[Yuri Y. Kovalev]

Dear Amy,

Unfortunately, there was no way for me to use an unfrozen 
version of 31DEC09 AIPS since I have installed it on my work 
station late in December 2009 only after it was announced by the 
NRAO to be frozen. And I do continuously update it.

However, these news do provide a hope. Thank you.
I will contact you if I get such problems again.

Cheers,
Yuri

On Wed, 10 Feb 2010, Amy Mioduszewski wrote:

> Hi Yuri,
>
> Do you know when you last ran the midnight job on your AIPS? 
> When I run APCAL with your data in the 31DEC09 and 31DEC10 
> versions I cannot reproduce your problem.  However, if I run 
> it with a random private version I have (dated Dec 2, 2009), I 
> can reproduce it.  My guess is your version of AIPS had some 
> flaw that was fixed by the time 31DEC09 was frozen.  So you 
> need to update your AIPS at least to the 31DEC09 frozen 
> version.
>
> Cheers,
>
> Amy
>
> Yuri Y. Kovalev wrote:
>> Dear colleagues,
>>
>> I used to have problems with the WX table doing opacity
>> correction in APCAL many times in 2009. It was always solved by
>> producing an external WX table by VLOG and then using external
>> WX table in APCAL instead of the one coming with the correlator
>> output.
>> I was hoping that the problem is gone since DiFX started its
>> operations.
>> However, the problem is back again with DiFX and I wonder if you
>> could take a look at it and fix it?
>>
>> I have used:
>> BL149CG FITS IDI file from the NRAO archive,
>> AIPS 31DEC09 being continuously updated.
>>
>> Commands:
>>
>> ** Calibrate amplitudes in APCAL
>> infil ''; SOUR = ' ';timer 0;
>> STOKES = ''; TYVER = MAXTAB('TY'); GCVER = MAXTAB('GC')
>> SNVER = MAXTAB('SN') + 1; OPCODE='GRID'; APARM=0; SOLINT=0
>> TAU0 = 0; DOFIT = 1; PRTLEV = 0; INVERS = 1
>> DOTV = FALSE; LTYPE = 3; APARM(5) = 5; TREC = 0;
>> INVERS = 1; CALIN ''
>> RUNWAIT ('APCAL')
>>
>> Error messages log:
>>
>> JET   > APCAL2: Task APCAL  (release of 31DEC09) begins
>> JET   > APCAL2: TABIO: BAD LRNO =      1523 LIMIT      1521
>> JET   > APCAL2: TABWX: ERROR   2 FROM TABIO OPCODE = READ
>> JET   > APCAL2: REAWX: ERROR  2 SOMETHING WRONG WITH WX TABLE
>> JET   > APCAL2: TXTWX: ERR  2 OPENING WX TABLE   1
>> JET   > APCAL2: Purports to die of UNNATURAL causes
>> JET   > APCAL2: jet          31DEC09 TST: Cpu=       0.0  Real=       0
>>
>> I would expect this problem to be reproducible always.
>>
>> Cheers,
>> Yuri
>>
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>