1.) imwrite() and 2.) octcdf-1.0.13

[katha]

Hey,
First of all, I have no clue of how a PC or octave work, I only try to work
with it. I hope my questions aren't to stupid. 

I just got octave 3.3.53 on and tried to use the  imwrite-function and got
the following message:

>imwrite(Bild,"Testpng.png","png")
>error: __magick_format_list__: not available in this version of Octave
>error: called from:
>error:   /usr/local/share/octave/3.3.53/m/image/imwrite.m at line 72,
column 3

What is "not available in this version of Octave" ? How do I get it?

The 2. problem is about octcdf-1.0.13.
If I try to call a function of the package, "break down" 

>octave:41> nc=netcdf("Test.nc",'c')
>terminate called after throwing an instance of 'std::bad_alloc'
>  what():  std::bad_alloc
>panic: Aborted -- stopping myself...
>attempting to save variables to `octave-core'...
>save to `octave-core' complete
>Abgebrochen

What happened and how can I fix it??

Hope you can help me

Katha
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