unreachable and dead code

why i am getting unreachable and dead code warning , i am not able to understant.

if anyone knows, please help me.

[Image Analyst]

I can't even read that thing. What is that diagram? Is it Stateflow or Simulink (which I don't have)? How did you run your check on it? You might have some condition that is always false, like

value = false
if value
    % Do something if value = true
    % This block will never get executed since value is not a variable,
    % it's a constant.
end