Hello Linh,
Please try assigning the output of 'intlinprong' to a temporary variable 'x_temp' and then, if 'x_temp' is empty, we can set 'x' to 'x_old'. Please refer to below code snippet for the same
% preallocate size of x
x = zeros(1650, 1);
x_temp = intlinprog(f, intcont, A, b, Aeq, beq, lbt, ubt);
if isempty(x_temp)
disp("no solution");
x = x_old;
else
% update x_old
x_old = x_temp;
x = x_temp;
end
Simulink being a dynamic tool expects consistent sizes variables, it simply expects 'x' to have size 1650x1 but actual is 0x0, so on the mismtach it raises an error.
Te above code modification should resolve the mismatch error and allow simulation to continue running without errors.
Hope this helps !
