title: Why Special Character in Variable Name Gives Error?
body: <p>I have the following freemarker file:</p>
  <pre><code>&lt;#ftl strip_whitespace=&quot;true&quot;&gt;
  ...
  &lt;#assign wän = ...&gt;
  </code></pre>
  <p>If I run such a freemarker on one server, it's working well, If I run it on a different server, I get this:</p>
  <blockquote>
  <p>freemarker.core.ParseException: Syntax error in template
  &quot;template-name.ftl&quot; in line 15, column 100: Lexical error: encountered
  &quot;\ufffd&quot; (65533), after &quot;&quot;.   at
  freemarker.core.TokenMgrError.toParseException(TokenMgrError.java:247)[445:org.freemarker.freemarker:2.3.23.stable]</p>
  </blockquote>
  <p>The version of my freemarker is 2.3.23.stable.</p>
  <p>Any hint what I should do to be able to run this template on the bugy server?</p>
  <p>N.B. I run my freemarker template from Apache Karaf.</p>