Question: What's wrong with Maple 18.02?

Hi everyone.

I always used simple command to plot graphs with parametric function:

> plot([seq([i, t, t=0..11-i], i=1..10)], thickness=3, color=blue); 

And I always obtained this:

But yesterday I installed second update for Maple 18, and now I get only error:

"Error, (in plot) invalid input: ToInert expects 1 or 2 arguments, but received 0"

What command I should use now?

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