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I am trying to acquire some experience in Mathematica and goal programming.

In the example shown in the attached image I am trying to minimize the deviations in order to obtain the first row matrix value nearest to 10.

In this case I should obtain x11=5 , n1=5 and p1 =0 instead of i receive these errors:

Part::pspec: Part specification Subscript[x, 1,1] is neither an integer nor a list of integers. >>

Part::pspec: Part specification 0.6524678079740285` is neither an integer nor a list of integers. >>

NMinimize::bcons: The following constraints are not valid. >>

Does someone explain me why I obtain these errors??

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# Partpspec: in Nminimize method

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