DC-DC PV converter circuit check to solve the error

Hi,I'm new to MATLAB. Im currently doing a project to simulate dc-dc PV module and application of MPPT. I've chose P&O algorithm for the MPPT technique, and attached is what I have currently done. I have these errors i dont really understand what they mean. Can someone check it up and help me solve it?

Answer 1

[Walter Roberson]

You have an algebraic loop; see http://blogs.mathworks.com/simulink/2015/07/18/why-you-should-never-break-an-algebraic-loop-with-with-a-memory-block/

You also have a message about discontinuities being found; when you run, you get NaN or Inf just after time 2.0 . Possibly resolving the algebraic loop might help that.