Problems using the image function

[Michael Martins]

Ich have problems to use the image and imagesave function. The command 
sequence:

        octave:1> a = [1 2; 3 4];
        octave:2> image(a);

gives the following error message:

        warning: save: no such variable `image.1307.img'
        octtopnm: unable to open input file

Even if I try to save the image with saveimage with

        octave:3> saveimage("test.image",a,"img");

I get the following message
        
        warning: save: no such variable `test'

What should I do ??

Sincerely
        Michael

--
|\  /|  Michael Martins, Max-Planck-Institut f"ur Radioastronomie
| \/ |  Gruppe Optische Interferometrie
| |\/|  Auf dem H"ugel 69            Phone: +49-228-525 395
| |  |  D-53121 Bonn, Germany        Email: address@hidden