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You could try "ls -lt" in the data area. I suspect that the files causing a problem are all rather old and that your files are not old. The file names are ttDnnnvvv.uuu; where tt is the file type, D is the version code (not changed in many years), nnn is
the catalog number, vvv is the version number (i.e. when you have multiple plot files), and uuu is the user number. Note that nnn, vvv, and uuu are in what we call "extended hex" or base 36 (0-9, A-Z). If you "source LOGIN.SH" in the $AIPS_ROOT area then
the command REHEX xxx will convert xxx in extended hex into a regular number. EHEX yyy converts yyy into extended hex. Files that are not known to your CATALOG can be recovered if they have a CB file (the header). If they don't then they should be deleted.
The best way to look may require a "ls -l ??Dnnn???.uuu\;" which will show you all files for the catalog number nnn. Note that you have to do that 1 nnn at a time but the ls -lt may not get all the files for an nnn right together.</div>
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<b>From:</b> mz <mgnahz@gmail.com><br>
<b>Sent:</b> Friday, April 24, 2026 4:33 AM<br>
<b>To:</b> Eric Greisen <egreisen@nrao.edu><br>
<b>Subject:</b> Re: Extension table missing {External}</div>
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<div style="direction: ltr;">Dear Eric,</div>
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<div style="direction: ltr;">What should I do to get the tables loaded right now? How to clean the data area without destroying all the data?</div>
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<div style="direction: ltr;">Best regards,</div>
<div style="direction: ltr;">Ming</div>
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<div style="direction: ltr;">On Thu, 23 Apr 2026 at 23:43, Eric Greisen <<a href="mailto:egreisen@nrao.edu" id="OWAd1cbdd2f-8f3e-1e3d-5fef-32a20244c78b" class="OWAAutoLink">egreisen@nrao.edu</a>> wrote:</div>
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Thank you. I will not need the data file since we solved the problem without it. When things go wrong in AIPS, files get left in the data area sometimes. If they are not attached to a current entry in the catalog then all they can do is cause problems.
The GN table issue is not a problem. The TABINI message says that your modern AN file (14 columns) encountered an old format AN table (the 2 columns were added in 2009 !) I gather that things are working now, congratulations.</div>
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Eric Greisen</div>
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<b>From:</b> mz <<a href="mailto:mgnahz@gmail.com" id="OWAb537872d-7ef9-c1dd-0198-fbcda13a3c4f" class="OWAAutoLink">mgnahz@gmail.com</a>><br>
<b>Sent:</b> Thursday, April 23, 2026 3:24 AM<br>
<b>To:</b> Eric Greisen <<a href="mailto:egreisen@nrao.edu" id="OWA517b7485-b912-56ae-3ac9-66cd68bce164" class="OWAAutoLink">egreisen@nrao.edu</a>><br>
<b>Subject:</b> Re: Extension table missing {External}</div>
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<div style="direction: ltr;">Dear Eric,</div>
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<div style="direction: ltr;">Thank you very much for your willing to help. </div>
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<div style="direction: ltr;">First, the lines before TABINI is here:</div>
<div style="direction: ltr;">CUSP > FITLD5: UV table spanned time: 0/01:00:00 - 0/06:23:56<br>
CUSP > FITLD5: 75793 vis. written<br>
CUSP > FITLD5: Warning: table type GN is of zero length<br>
CUSP > FITLD5: TABINI: KEY COUNTS 35 51 OR COLS 14 12 DON'T MAT<br>
CUSP > CH<br>
CUSP > FITLD5: TABINI: ERROR ON TYPE AN DISK 1 CNO 2 VERSION 1</div>
<div style="direction: ltr;">It seems the GN table may have caused the cascade effect below. </div>
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<div style="direction: ltr;">Second, I have a public NAS server for you to access the FITS data:</div>
<div style="direction: ltr;"><a href="https://kuohaouu.synology.me:55001" id="OWAdd9e2611-0a4f-e9b6-6cc4-63f9d5a567d2" data-auth="NotApplicable" class="OWAAutoLink">https://kuohaouu.synology.me:55001</a></div>
<div style="direction: ltr;">username: vlbi</div>
<div style="direction: ltr;">password: Shao64386191</div>
<div style="direction: ltr;">After you log in, directly go to "File Station" on the desktop and then click "vlbi-data" in the left panel, you will find a "pa002b" directory. Expand the "pa002b" directory, you will find my "pa002b.FITS" data. Its size is about
18GB.</div>
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<div style="direction: ltr;">I have attached the PRTTP output as well for your investigation in the attachment. As the orphan files in the data area, I did encounter some messages saying that CBD* UVD* SCD* HID* FQD* etc already exist. I deleted them in DATA
directory and the FITLD task could go forward then. Thank you very much for your consideration.</div>
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<div style="direction: ltr;">Best regards,</div>
<div style="direction: ltr;">Ming</div>
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<div style="direction: ltr;">On Thu, 23 Apr 2026 at 07:16, Eric Greisen <<a href="mailto:egreisen@nrao.edu" id="OWA924a5d05-08e7-c781-d677-5cf57245688d" class="OWAAutoLink">egreisen@nrao.edu</a>> wrote:</div>
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I may be able to tell something from the answers to my previous email. A full test would require your making the FITS file available to me. If it is not too large, putting it on a public ftp site should work.</div>
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Eric</div>
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<b>From:</b> mz <<a href="mailto:mgnahz@gmail.com" id="OWA103a466b-2199-87fe-af90-b1947880af48" class="OWAAutoLink">mgnahz@gmail.com</a>><br>
<b>Sent:</b> Wednesday, April 22, 2026 12:29 AM<br>
<b>To:</b> Eric Greisen <<a href="mailto:egreisen@nrao.edu" id="OWAf73d32f3-9abe-dc66-fa5b-0f5c134e81d2" class="OWAAutoLink">egreisen@nrao.edu</a>><br>
<b>Subject:</b> Extension table missing {External}</div>
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<div style="direction: ltr;">Dear Eric,</div>
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<div style="direction: ltr;">I've got the correlated FITS file from our correlator and when I load it into AIPS I got the ERROR messages like:</div>
<div style="direction: ltr;">CUSP > FITLD5: TABINI: ERROR ON TYPE AN DISK 1 CNO 2 VERSION 1<br>
CUSP > FITLD5: ANINI: ERROR 1 FROM TABINI OPCODE = WRIT<br>
CUSP > FITLD5: ANINI: ERROR 1 INITIALIZING ANTENNA TABLE FOR WRIT<br>
CUSP > FITLD5: AG2AN: ERROR 1 OPENING AN TABLE # 1<br>
CUSP > FITLD5: BT2AIP: ERROR 1 FORMING ANTENNA TABLE<br>
CUSP > FITLD5: ERROR 1 RETURNED FROM BT2AIP<br>
CUSP > FITLD5: Purports to die of UNNATURAL causes</div>
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<div style="direction: ltr;">I checked the loaded uv data that the AN and SU tables are missing. Is that a garbled file from the correlator, or is there any way to reconstruct those tables in AIPS? Thank you very much for your suggestion.</div>
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<div style="direction: ltr;">Best regards,</div>
<div style="direction: ltr;">Ming Zhang</div>
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