title: Gurobi: Modified Q diagonals
body: <p>I'm using Python and Gurobi to formulate and solve optimization problems.
  When solving my current formulation, I get the output <code>Modified 2 Q diagonals</code> many times. Oftentimes, instead of <code>2</code>, other numbers like <code>12</code> or <code>14</code> appear.</p>
  
  <p>I googled, but I could not find any documentation on what that means. I still get a valid solution, but it seems to take longer. Do I have to rewrite my constraints in a certain way?</p>