Question: Warning, unable to evaluate the function to numeric values in the region

Hi guys,

I'm studying a system of six differential equations. Given the fact that the system cannot be solved symbolically, I've tried the numeric procedure, and it works. I proceeded like this :


then i checked if maple could calculate the solutions for given values of t. It works for t=0, t=0.5, t=1,t=2,...,t=5. The solutions are all real numbers.

But when i try to draw a graphic representation of the solutions, it doesn't work. I do :


Then :


(The square brackets are indices)

Now maple answers that it is "unable to evaluate the function to numeric values in the region". I went to the help page but no solution seems to work. I can't figure it out by myself. Does anybody notice something wrong with my code ?

Thank you for your time,

Best regards,


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