imread() fails to find __magick_read__

[Enno Fennema]

I am new to octave and installed from SuSE 11.3 x86_64. Ordinary things
including plotting using gnuplot work fine. I want to process images
but the statement :

I = imread ("image24.png");

produces

error: imread: invalid image file: __magick_read__: not available in
    this version of Octave
error: called from:
error:   /usr/share/octave/3.2.4/m/image/imread.m at line 74, column 7

I have no idea what file/library would contain __magick_read__. The
manual implies I need GraphicsMagick.

I installed /usr/lib64/GraphicsMagick-1.3.12 but that doesn't solve the
problem.

Any help appreciated.
Enno