Ask Your Question

Unable to start QEPCAD

asked 2015-08-18 06:13:10 -0500

Alasdair gravatar image

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 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.

edit retag flag offensive close merge delete

1 answer

Sort by ยป oldest newest most voted

answered 2015-08-18 07:38:08 -0500

tmonteil gravatar image

The 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. 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

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Question Tools

1 follower


Asked: 2015-08-18 06:13:10 -0500

Seen: 156 times

Last updated: Aug 18 '15