SELFCAL produces bad gain table?

[and460]

Hi guys,

I have a bunch of sources observed at 3cm that I ran through a normal calibration on, up to and including the secondary gain calibration. I then applied the cal to the sources with UVAVER. I now want to self calibrate.

I split two of the sources out of the master uv file. I ran selfcal on the first and get:

selfcal% inp
Task: selfcal
vis = ./lmc_s11.9000
select =
model = *wfmfs_postpsc*clmodi
clip = 0.1
interval = 0.5
nfbin = 4
options = phase,mmfs
minants =
refant =
flux =
offset =
line =
selfcal% go

selfcal: Revision 1.16, 2014/08/22 01:09:57 UTC

Calculating the model for lmc_s11wfmfs_postpsc.8320.clmodi
Clipping model when: pixval < 0.10
Accumulating statistics ...
Calculating the model for lmc_s11wfmfs_postpsc.8742.clmodi
Clipping model when: pixval < 0.10
Accumulating statistics ...
Calculating the model for lmc_s11wfmfs_postpsc.9197.clmodi
Clipping model when: pixval < 0.10
Accumulating statistics ...
Calculating the model for lmc_s11wfmfs_postpsc.9644.clmodi
Clipping model when: pixval < 0.10
Accumulating statistics ...
Finding the selfcal solutions ...
Correlations with inappropriate Stokes type discarded: 65174592
Total number of correlations being used: 65174592
Total number of solution intervals: 107
Solution intervals merged together: 3
Rms of the gain phases (degrees): 26.9
Rms deviation of gain from 1: 6.069E-08
Ratio of Actual to Theoretical noise: 1.38
Solution for freq. bin 1
Rms of the gain phases (degrees): 25.7
Rms deviation of gain from 1: 5.858E-08
Ratio of Actual to Theoretical noise: 1.28
Solution for freq. bin 2
Rms of the gain phases (degrees): 26.8
Rms deviation of gain from 1: 5.842E-08
Ratio of Actual to Theoretical noise: 1.30
Solution for freq. bin 3
Rms of the gain phases (degrees): 27.4
Rms deviation of gain from 1: 6.190E-08
Ratio of Actual to Theoretical noise: 1.43
Solution for freq. bin 4
### Warning: Intervals with no solution: 2
Rms of the gain phases (degrees): 28.5
Rms deviation of gain from 1: 6.246E-08
Ratio of Actual to Theoretical noise: 1.48
selfcal%


The task completes with no problems, with no indication that anything untoward happened. However, when I then try to image it (or run any other task on it), I get:

### Fatal Error: Gain table size is incorrect

I can't understand how MIRIAD could be complaining about an incorrect gain table size, given that all of the other calibrations have previously been applied using UVAVER. Even more strangely, I did exactly the same thing for the second source, and in this case I get no problems at all. Any ideas what might be going wrong here?

Cheers,
Craig.

[Mark.Wieringa]

Hi Craig,

I've seen this message before, but not with mmfs selfcal.
Try a mirsync (now that it is working again) and if you still get the same error afterwards put the data somewhere where I can have a look at it.

Cheers,

Mark

[and460]

Thanks Mark - this was fixed by a mirsync (and thanks for fixing my mirsync issue too!).