I'd like to use the price of workspace in GA.

I'd like to optimize the system as shown in the below by a genetic algorithm (GA). q of the system indicated below will use the defined price for work space, but When GA is carried out, an error like "The function or variable 'q' is undefined." goes out. Isn't it possible to use the price of the work space? By the way, q is the matrix of 1×11 output from a model of simulink．

[michio]

dup: https://jp.mathworks.com/matlabcentral/answers/321682-workspace