[daip] [!12398]: AIPS - SNPLT refuses to plot some tables; TABED copies -ive rows even with BCOU=1

[Michael Bietenholz]

Michael Bietenholz updated #12398
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SNPLT refuses to plot some tables; TABED copies -ive rows even with BCOU=1
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           Ticket ID: 12398
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/12398
                Name: Michael Bietenholz
       Email address: mbieten at yorku.ca
             Creator: User
          Department: AIPS Data Reduction
       Staff (Owner): -- Unassigned --
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template group: Default
             Created: 24 July 2018 07:36 PM
             Updated: 24 July 2018 07:36 PM
           Reply due: 26 July 2018 07:36 PM (2d 0h 0m)
      Resolution due: 19 April 2021 12:00 AM (999d 4h 24m)

[31DEC18 Midnight job yesterday]SNPLT refuses to plot anything for some SN tables - for reasons that escape me, although I thinkit may have to do with -ive row numbers.  Also, TABED, OPTY 'COPY'; BCOU 1; ECOU 100*does* copy -ive row numbers, even though I think it shouldn'tI ran TABED w/ opco 'DELE' to flag some table rows in an SN table.  SNPLT plots the pr-TABED table just fine,but when I try and plot the post-TABED table it plots nothing (I ran TABED *not* in place, ie. INVER != OUTVER)localh> SNPLT1: polaris 31DEC18 TST: Cpu= 0.0 Real= 2 IO= 1localh> SNPLT1: Task SNPLT (release of 31DEC18) beginslocalh> SNPLT1:localh> SNPLT1: Appears to have ended successfullylocalh> SNPLT1: polaris 31DEC18 TST: Cpu= 0.0 Real= 0Now there *are* rows left to plot, and according to TBOUT there are no differences in the table headers, the only differencebeing that some of the row # have turned -ive in the table after   LISTR OPTY='GAIN' printsout values.  I'm stumped as to why SNPLT doesn't plot anything.  I tried TASRT and TBIN->TBOUT, and SNPLT could plot neither,so whatever "feature" of the SN table causes SNPLT to not plot anything is preserved through those.Whatever goes wrong FITTP/FITLD does seem to fix it - I made a little test TASAV to send you, and when I tried the original version, SNPLT failed, but when I tried it after FITLD'ing it, it worked.  A difference hereis that FITTP/FITLD seems to loose the table rows with -ive row numbers that TABED produces.If you FITLD the attached snplt_test.fits file you should get SN1,SN2, both of which plot fine  SN1 is the originalSN2 is after TABED. If, however, you use TBIN to read in the sn11.txt file (also attached) to a new SN table (this is the one I passed through TABED; which  retains the rows w/ -ive numbers), then it won't plot.I tried to filter out the -ive row # withTABED; OPTY 'COPY'; BCOU 1; ECOU 1648but that did not work, its happy to copy row number -2, and output table had same # of rows as input.

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