title: Error "<istmt>: 3499 mm_radial() not found"
body: <p>I have installed in Stata 13.1 MP 64bit the <code>st0352</code> package, which performs propensity matching for continuous treatment variables and used the example provided by the authors. </p>
  
  <p>Then i run the commands described by the author in the Stata Journal article but i got an error.</p>
  
  <p>The code and results can be found below:</p>
  
  <pre><code>use "LotteryDataSet.dta", clear
  
  drop if year6==.
  su prize, de
  drop if prize &gt;= r(p95)
  replace year6 = year6/1000
  mat def tp = (10\20\30\40\50\60\70\80\90\100)
  
  set more off
  
  drf agew ownhs owncoll male tixbot workthen yearm1 yearm2 yearm3 yearm4 yearm5 yearm6, ///
  outcome(year6) treatment(prize) gpscore(gps) test(L_like) tpoints(tp) numoverlap(3) ///
  method(radialpspline) family(gaussian) link(log) nknots(7) det delta(1)
  
  .................. omitted
  
  ****************
   DRF estimation 
  ****************
  
  Radial penalized spline estimator
  
  Run 1  ..                                   (Cpq =         716.46)
  Run 2  ..                                   (Cpq =         583.26)
  Run 3  ....                                 (Cpq =         594.32)
  Run 4  ...                                  (Cpq =         639.28)
  Run 5  ..                                   (Cpq =         601.10)
  
  ***&lt;istmt&gt;:  3499  mm_radial() not found***
  </code></pre>
  
  <p>I don't know why this is happening. I have searched Stata's official website but found nothing referring to <code>mm_radial()</code>. </p>
  
  <p>How can i fix this problem?</p>