On Nov 14, 2009, at 7:00 PM, Mike Witt wrote:

> Can anyone tell me if this is really an out of memory error?
>
> MemoryError: Out of memory allocating triangulation for <type
> 'sage.plot.plot3d.implicit_surface.ImplicitSurface'>

Yes, see

http://hg.sagemath.org/sage-main/file/badc4b233e10/sage/plot/plot3d/index_face_set.pyx#l238

which means malloc or realloc returned NULL. Other than running out of  
memory, I'm not sure of anything that would make (re|m)alloc return  
NULL. (FYI, sage_malloc is just malloc, see 
http://hg.sagemath.org/sage-main/file/badc4b233e10/c_lib/include/stdsage.h#l167 
  .)

> This happens when I'm calling implicit_plot3d(). I aplogize for not
> posting more context, but it will take some work to come up with a
> working fragment that doesn't have a lot of other complications. The
> thing is, that I appear to have plenty of available memory when this
> happens, and I suspect that it's really some other kind of error
> (probably in my code :-)  I was just hoping that somebody might have
> an idea what might generate this.

That's hard to tell without a reproducible example, but it could be  
that there's a memory leak elsewhere that's causing it to run out of  
memory here.

- Robert


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