title: "{ required" in nested loop in stata
body: <p>I hate to annoy you guys with this question, but I am getting the error "{ required" even though all my loops appear to be open (and closed) properly and unfortunately Stata doesn't tell you where the error is, so I can't figure out why this is happening. By the way if I take out the append_replace section with the if statements, I am still getting the same error, so I don't think it is from that section. Here is my code:</p>
  
  <pre><code>local vars = "any_rate resp_rate circ_rate weight_rate diabetes_rate gallstones_rate   mental_rate cancer_rate std_rate died_rate"
  local dates = "1947 1974"
  foreach var of local `vars' {
      foreach i of local `dates' {
          forvalues j = 500(100)2500 {
              local append_replace = "append"
              if "`var'"=="any_rate" {
                  if "`i'" == "1947" {
                      if `j' == 500 {
                          local append_replace = "replace"
                      }
                  }
              }
              reg `var' post`i' dobdistfrom`i'change dobdistfrom`i'changesq post`i'_dist`i' post`i'_dist`i'sq if dobdistfrom`i'change &lt; `j' &amp; dobdistfrom`i'change &gt; -`j', cluster(dobdistfrom`i'change)
                  outreg2 using Prelim_RD_Estimates.xls, `append_replace' excel dec(3)
          }
      }
  }
  </code></pre>
  
  <p>Thanks so much for your help!</p>