title: Solver Constraint use range with formulatext
body: <p>I have a very short question, but I simply dont get why this isnt working.</p>
  
  <p>I have a solver constraint set up.
  The following code is working (row 14 is going to be the changeable variables, while row 13 will be the constraints).</p>
  
  <pre><code>SolverAdd CellRef:=ws1.Range(ws1.Cells(14, 2), ws1.Cells(14, 5)), Relation:=1, FormulaText:="$B$13:$E$13"
  </code></pre>
  
  <p>So I thought that following should be working as well</p>
  
  <pre><code>SolverAdd CellRef:=ws1.Range(ws1.Cells(14, 2), ws1.Cells(14, 5)), Relation:=1, FormulaText:=ws1.Range(ws1.Cells(13, 2), ws1.Cells(13, 5))
  </code></pre>
  
  <p>And I am sitting here, scratching my head and wondering why I get an error (undefined internal error or too less usable ram).</p>