This will not work properly as in the model equations you use j and in your loop you use jj. You should remove the index j from your model.
In the loop you assign for the parameters without j the value from your table and you solve the model. Here is the code (note that in your model equations there is no j left and I replace x(i,j) and y(r,j) by xl(i) and y(r).
parameter yl(r) 'Loop value for y(j,r)',
xl(i) 'Loop value for x(j,x)';
model fractionalccr_model /all/;
parameters efficiency summary report;
xl(i) = x(i,j);
yl(r) = y(r,j);
solve fractionalccr_model using nlp max z;
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