On Thu, 12 Nov 2015, Ian A Taylor wrote:
> I run a linux lab (Ubuntu 14.04)
> This loads star-hikianalia
> Yes I know that is old but there were other reasons I could not upgrade the software...
>
> so they have gaia 4.4.4
>
> One particular student has a problem
> (this problem is - I am lead to believe - unique to this particular student)
>
> Here are the list of commands I have typed into the terminal and the
> stuff I was doing (or trying to do in Gaia).
>
> cd /teaching/AS4025/lm224/exo/pipeline
> source autobahn.csh 2015 0210 J070143.17+142515.0
>
> Terminal then prompted whether I wanted to use previous gaia file (y/n) to which I responded 'n'.
>
> Gaia then opened; in gaia:
> Clicked Image Analysis - Aperture Photometry - Results in magnitudes
>
> Aperture photometry magnitude window opened
> Clicked Define object aperture
> Circled star 1
> Clicked Define object aperture
> Circled star 2
> Clicked define object aperture
> Circled star 3
> Clicked define object aperture
> Clicked Save
>
> An error message popped up:
> Application Error
> Error: missing operand at _@_
> in expression "_@_*1.5"
>
> Clicked OK
> Tried clicking Save again
>
> An error message popped up
> Application Error
> Error: missing operand at _@_
> in expression "sqrt(1.0-(_@_*)/(*))"
>
> I hope this is helpful!
>
> Any insight solution anyone could provide would be useful
Hi Ian,
I've attempted to reproduce this problem and cannot, so as you say this is
probably an issue with this specific user. The "sqrt(1.0-(_@_*)/(*))"
looks like a calculation involving the eccentricity, are you sure you are
not reading back old measurements from a disk file? That's the only way I
could imagine getting funny values in. Alternatively check that the user
doesn't have a funny LD_LIBRARY_PATH set (i.e. the Starlink installation
should come before other ones), it could be that an incompatible shared
library (for Tcl/Tk) is being loaded.
Cheers,
Peter.
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