mat2gray not working when called from Perl only console

[amonterou]

I have a script in perl that generates a .m file based on a series of
parameters and then runs an octave algorithm through ticks like:

`octave my_script`;

And then I capture the results in a separate file. The problem is that even
having installed the image package succesfuly mat2gray function is not
working. 
If I open manually octave like a separate console to be used manually, and
call my script it does work perfectly. The issue appears only when calling
the octave.exe from Perl. It shows:

error: `mat2gray' undefined near line 21 column 6

Which looks like the typical error you get when you don't have the image
package. I already tried to iclude a line on my script at the very top to
rebuild the package everytime my script runs, like so:

pkg rebuild -auto image;

But that didn't fix it. Anyone has seen this kind of odd behavior?

I'm using Octave 3.2.4, since I need that version due to some compatibility
issues with other pieces of software that we need. And some plotting
capabilities when called from perl don't work all that well. Just in case
you were wondering.



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