Question: proc() uses DEtools


I'm working on implementing a plot of the Lorenz equations, and I'm trying

  proc(something, something, more something) local something more;

  uses DEtools;


  end proc

And I get this response:

  Error, `DEtools` is not a module or member

What can I do? "uses" works for plots, LinearAlgebra etc. Why doesn't it work for DEtools?


Hope someone can help! :)


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