title: ns found the right version of tclsh in /usr/bin/tclsh8.6 but it doesn't seem to be there anymore for ns2
body: <p>When I write $ns in Linux terminal it shows this message:</p>
  <pre><code>&quot;When configured, ns found the right version of tclsh in /usr/bin/tclsh8.6
  but it doesn't seem to be there anymore, so ns will fall back on running the first tclsh in your path. The wrong version of tclsh may break the test suites. Reconfigure and rebuild ns if this is a problem. &quot;
  </code></pre>
  <p>will it cause any problem with my TCL file being executed?
  I am using <code>ns-allinone-2.35</code>.</p>