ILMATRIX bug

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petrenko
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ILMATRIX bug

Post by petrenko » 24 Oct 2011, 16:00

Elegant is terminated witn an error "Terminated by SIGSEGVProgram trace-back:" if you try to use the ILMATRIX in tracking (but it's OK to use it in Twiss parameters calculation).

Please see the attached example for details.

/Alexey
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michael_borland
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Re: ILMATRIX bug

Post by michael_borland » 28 Feb 2012, 09:45

Alexey,

Sorry I didn't see this earlier. This is a known bug that I haven't gotten around to fixing.

The problem is that elegant is looking for twiss parameters, but they haven't been computed. You can fix this by adding
&twiss_output matched=1 &end
in the file after &run_setup.

See attached.

--Michael
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petrenko
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Re: ILMATRIX bug

Post by petrenko » 28 Feb 2012, 10:19

Thanks Michael!

For my simulation linear_chromatic_tracking_setup turned out to be just fine, so this bug was not critical to me.

Of course ILMATRIX is more flexible, so I'll be using this element instead of linear_chromatic_tracking from now on.

/Alexey

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