Opening saved isosurface() figures with hgload()

[Cola]

Hi all,

I'm using Octave to generate an isosurface() plot based on a large data
file. 
I need to be able to pull up the resulting interactive figure whenever I
need; a still image won't do. 
However, reading the data file takes upwards of a minute, so instead of
doing that each time I want to see the figure, I thought I might save the
figure with hgsave() and then open it whenever with hgload().
Saving the figure seems to work fine, but when I try to open it I get the
following error:

*error: struct2hdl: light objects are not implemented yet*

Does this mean it can't be done? Does anyone know of any alternatives?



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