Hi rt,

sage-on-gentoo bugs are best discussed in a github issue unless you
can reproduce it in a “vanilla” sage build. Github issue for sage-on-gentoo:
https://github.com/cschwan/sage-on-gentoo/issues

Funny that your message lead Volker to something that was wrong 
in vanilla when your problem is unrelated. Volker's advice is not applicable
to your install since “sage -i” doesn’t exist in sage-on-gentoo.

Can you post "/root/.sage/temp/rt./12958/tmp_KGOIjb.txt” so I can try
to figure it out.

François

> On 14/07/2015, at 04:50, rt. <rtgisk...@gmail.com> wrote:
> 
> this is a newly built version together with gentoo, while the other functions 
> works well with only 3d plot failed.
> As I excute the following command:
> 
> sage: var('x,y')
> sage: plot3d(sin(x*y), (x, -pi, pi), (y, -pi, pi))
> 
> it returns :
> 
> /usr/lib64/python2.7/site-packages/sage/repl/rich_output/display_manager.py:561:
>  RichReprWarning: Exception in _rich_repr_ while displaying object: Jmol 
> failed to create file '/root/.sage/temp/rt./12958/dir_W9ZHtR/preview.png', 
> see '/root/.sage/temp/rt./12958/tmp_KGOIjb.txt' for details
>   RichReprWarning,
> Graphics3d Object
> 
> Not knowing what's going wrong, I have rebuild Jmol, but it changed nothing
> maybe I can find the solution or reason here, and just around these days, 
> thanks to any help very much.
> If needed, more information would be provided (as now I don't know what's 
> neesded.
> 
> Thanks very much!
> 
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