function still 'missing' even after package installation

[mrpurple]

Hi,
I got 
warning: the `fminsearch' function is not yet implemented in Octave

Please read `http://www.octave.org/missing.html' to learn how you can
contribute missing functionality.
So I did
pkg install -forge optim
and got
warning: gen_doc_cache: unusable help text found in file 'test_d2_min_1'
warning: gen_doc_cache: unusable help text found in file 'test_d2_min_2'
warning: gen_doc_cache: unusable help text found in file 'test_d2_min_3'
For information about changes from previous versions of the optim package,
run 'news ("optim")'.
Working off the assumption that I could carry on despite the warnings I
tried running my work again and still got:
error: `fminsearch' undefined near line 27 column 15
I tried downloading the tarball and pkg installing manually but got the same
exact problem.
Now I'm stuck: I need to install a dependancy but installing the dependancy
doesnt solve my dependancy.
I dont even know where to start looking.



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