ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Tue, 18 Aug 2015 14:38:08 +0200Unable to start QEPCADhttps://ask.sagemath.org/question/28857/unable-to-start-qepcad/I have compiled and installed qepcad-1.50, but I can't run it. For example, these are lifted from the documentation:
sage: var('a,b,c,d,x,y,z')
sage: qf = qepcad_formula
sage: ellipse = 3*x^2 + 2*x*y + y^2 - x + y - 7
sage: F = qf.exists(y, ellipse == 0)
sage: qepcad(F)
However, this produces an error:
RuntimeError: Unable to start QEPCAD
I did discover a patch at https://abf.rosalinux.ru/import/sagemath/blob/rosa2014.1/sage-qepcad.patch but I'm not sure how to apply it. I'd be very happy for some advice.
I'm running sage-6.2, under Ubuntu 14.04.Tue, 18 Aug 2015 13:13:10 +0200https://ask.sagemath.org/question/28857/unable-to-start-qepcad/Answer by tmonteil for <p>I have compiled and installed qepcad-1.50, but I can't run it. For example, these are lifted from the documentation:</p>
<pre><code>sage: var('a,b,c,d,x,y,z')
sage: qf = qepcad_formula
sage: ellipse = 3*x^2 + 2*x*y + y^2 - x + y - 7
sage: F = qf.exists(y, ellipse == 0)
sage: qepcad(F)
</code></pre>
<p>However, this produces an error:</p>
<pre><code>RuntimeError: Unable to start QEPCAD
</code></pre>
<p>I did discover a patch at <a href="https://abf.rosalinux.ru/import/sagemath/blob/rosa2014.1/sage-qepcad.patch">https://abf.rosalinux.ru/import/sagem...</a> but I'm not sure how to apply it. I'd be very happy for some advice.</p>
<p>I'm running sage-6.2, under Ubuntu 14.04.</p>
https://ask.sagemath.org/question/28857/unable-to-start-qepcad/?answer=28858#post-id-28858The `qepcad` package is broken for a while and was considered experimental. It has just been repackaged and will be available in the next 6.9 release, see [trac ticket 10224](http://trac.sagemath.org/ticket/10224). If you can not wait, i suggest to build the latest beta (6.9.beta2) release which already contains it, you can get its source code at http://www.sagemath.org/download-latest.html
Tue, 18 Aug 2015 14:38:08 +0200https://ask.sagemath.org/question/28857/unable-to-start-qepcad/?answer=28858#post-id-28858