Question: Why does this error appear? "Error, (in DynamicSystems:-StateSpace) unsupported type of index, t"

Hello,

I am trying to define a statespace object. Here my code reads:

with(DynamicSystems):

 

aSys≔StateSpace(⟨⟨1,2⟩∣∣⟨3,4⟩⟩,⟨⟨2,3⟩⟩,⟨⟨1,0⟩∣∣⟨0,1⟩⟩,⟨⟨0,0⟩⟩):

Error, (in DynamicSystems:-StateSpace) unsupported type of index, t

I do not have any clue what is wrong with my code.

 

Any help will be really appreciated.

Thanks

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