[daip] Quick question re data weights

[Shami Chatterjee]

Hi, just a quick question:

I'm trying to calibrate test data acquired with the MWA, and it  
includes no calibration information (obviously), so I'm going to have  
to fringe fit and/or self-cal on the bright source in the field  
center. Before I do that, I thought it would be useful to run a  
bandpass correction, since possm shows large phase slopes and freakish  
bandpass shapes.

For bpass I'm using bpassprm(5)=0 (normalize by inner 75%) and no  
source model, and it fails with errors of this form:

   BPASS1: Dividing the spectral data by channel 0
   BPASS1: SINGULAR MATRIX ON   1 -   2 IF =  1 WILL ZERO
   BPASS1: SINGULAR MATRIX ON   1 -   3 IF =  1 WILL ZERO
<etc etc>
   and once everything is zeroed, it dies.

I suspect this may be an issue with the data weights not set correctly  
or not recognizable in aips.   What is the simplest way for me to  
manipulate the data weights? (i.e., I want them all forced equal to 1,  
or something similar.)

Or if you had any other suggestions, I'd be happy to try those too.
Thanks very much!
Shami