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Empty FITS files from WebRun https://galprop.stanford.edu/forum/viewtopic.php?f=24&t=106 
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Author:  ajayb86 [ Thu Oct 21, 2010 11:27 am ] 
Post subject:  Empty FITS files from WebRun 
I've been doing 3D WebRuns with the default parameters, changing only the max_Z in nuclear abundances, and the FITS files generated seem to contain no values. Even the quick plots show no data. 2D, however, seems to be outputting data fine. I'm new to Galprop, so I've just been doing a few test runs with the already set parameters. I would appreciate some advice on the matter since there's every chance I'm doing something horribly wrong. Thanks. 
Author:  avladim [ Thu Oct 21, 2010 12:47 pm ] 
Post subject:  Re: Empty FITS files from WebRun 
For 3D runs, try setting parameter use_symmetry=0 (in the group Common Parameters). We need to introduce a fix for this either in the code, or in the WebRun validation rules. I will follow up with more details on this soon. 
Author:  ajayb86 [ Thu Oct 21, 2010 5:57 pm ] 
Post subject:  Re: Empty FITS files from WebRun 
Great, that's sorted it out. Thanks a lot. 
Author:  strong [ Fri Oct 22, 2010 12:03 am ] 
Post subject:  Re: Empty FITS files from WebRun 
I added a warning about this parameter in the GALPROP Explanatory Supplement . In fact now that computer resources have multiplied since GALPROP originated, the symmetry options are pretty much obsolete. 
Author:  tporter [ Sun Oct 24, 2010 10:30 am ] 
Post subject:  Re: Empty FITS files from WebRun 
We don't use the symmetry option for calculations, but it's very possible that we have checks in the code if to use it, and then do something, etc.  these should be cleaned out. 
Author:  strong [ Sun Oct 24, 2010 10:37 am ] 
Post subject:  Re: Empty FITS files from WebRun 
symmetry is only invoked iff use_symmetry>0 actually symmetry used to work fine ... and was well tested. something happened somewhere since then, evidently. I will make a test to find out what went awry. It is not worth the effort to fix it probably, just avoid it. 
Author:  avladim [ Sun Oct 24, 2010 1:06 pm ] 
Post subject:  Re: Empty FITS files from WebRun 
It may be that the fits files with use_symmetry=0 are not empty, but the plotting program in WebRun cannot do interpolation to the Sun's location properly. 
Author:  strong [ Sun Oct 24, 2010 11:35 pm ] 
Post subject:  Re: Empty FITS files from WebRun 
now I'm confused: I thought use_symmetry=0 did solve the problem, according to what is written above. and that use_symmetry = 1 was the problem. so the problem is just the plotting ? then use_symmetry = 1 is perhaps OK (which is what I would expect) ? 
Author:  avladim [ Sat Oct 30, 2010 1:54 pm ] 
Post subject:  Re: Empty FITS files from WebRun 
Sorry, I said it the other way around. What you think is correct, use_symmetry=0 works fine. 
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