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<chapter>
  <header>
    <copyright>
      <year>2002</year><year>2021</year>
      <holder>Ericsson AB. All Rights Reserved.</holder>
    </copyright>
    <legalnotice>
      Licensed under the Apache License, Version 2.0 (the "License");
      you may not use this file except in compliance with the License.
      You may obtain a copy of the License at
 
          http://www.apache.org/licenses/LICENSE-2.0

      Unless required by applicable law or agreed to in writing, software
      distributed under the License is distributed on an "AS IS" BASIS,
      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      See the License for the specific language governing permissions and
      limitations under the License.

    </legalnotice>

    <title>Event Tracer (ET) Release Notes</title>
    <prepared>H&aring;kan Mattsson</prepared>
    <docno></docno>
    <date></date>
    <rev>%VSN%</rev>
    <file>notes.xml</file>
  </header>
  <p>This document describes the changes made to the <c>Event Tracer
  (ET)</c> system from version to version. The intention of this
  document is to list all incompatibilities as well as all
  enhancements and bugfixes for every release of <c>Event Tracer
  (ET)</c>. Each release of <c>Event Tracer (ET) </c> thus constitutes
  one section in this document. The title of each section is the
  version number of <c>Event Tracer (ET)</c>.</p>

<section><title>ET 1.6.5</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Fixed warnings in code matching on underscore prefixed
	    variables.</p>
          <p>
	    Own Id: OTP-17385 Aux Id: OTP-17123 </p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.6.4</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    The scroll bar of the et_viewer window could not be
	    dragged all the way to the top of the window. It would
	    always stop at the second event. This is now corrected.</p>
          <p>
	    Own Id: OTP-15463 Aux Id: ERL-780 </p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.6.3</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Improved documentation.</p>
          <p>
	    Own Id: OTP-15190</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.6.2</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
	    <p> Calls to <c>erlang:get_stacktrace()</c> are removed.
	    </p>
          <p>
	    Own Id: OTP-14861</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.6.1</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Tools are updated to show Unicode atoms correctly.</p>
          <p>
	    Own Id: OTP-14464</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.6</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Update selector to utilize new garbage collection trace
	    tags.</p>
          <p>
	    Own Id: OTP-13545</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.5.1</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
	    <p>The <c>et</c> application must continue to use
	    <c>erlang:now/0</c> in order to obtain timestamps that
	    are consistent with timestamps obtained from tracing. The
	    application has been updated to suppress the warning for
	    <c>erlang:now/0</c>.</p>
          <p>
	    Own Id: OTP-12780</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.5</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Application upgrade (appup) files are corrected for the
	    following applications: </p>
          <p>
	    <c>asn1, common_test, compiler, crypto, debugger,
	    dialyzer, edoc, eldap, erl_docgen, et, eunit, gs, hipe,
	    inets, observer, odbc, os_mon, otp_mibs, parsetools,
	    percept, public_key, reltool, runtime_tools, ssh,
	    syntax_tools, test_server, tools, typer, webtool, wx,
	    xmerl</c></p>
          <p>
	    A new test utility for testing appup files is added to
	    test_server. This is now used by most applications in
	    OTP.</p>
          <p>
	    (Thanks to Tobias Schlager)</p>
          <p>
	    Own Id: OTP-11744</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Removed gs based applications and gs based backends. The
	    <c>observer</c> application replaces the removed
	    applications.</p>
          <p>
	    *** POTENTIAL INCOMPATIBILITY ***</p>
          <p>
	    Own Id: OTP-10915</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.4.4.5</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    The encoding of the <c>notes.xml</c> file has been
	    changed from latin1 to utf-8 to avoid future merge
	    problems.</p>
          <p>
	    Own Id: OTP-11310</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.4.4.4</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Use erlang:demonitor(Ref, [flush]) where applicable.
	    Thanks to Loïc Hoguin.</p>
          <p>
	    Own Id: OTP-11039</p>
        </item>
        <item>
          <p>
	    Rename and document lists:zf/2 as lists:filtermap/2.
	    Thanks to Anthony Ramine.</p>
          <p>
	    Own Id: OTP-11078</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.4.4.3</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
	    <p>Where necessary a comment stating encoding has been
	    added to Erlang files. The comment is meant to be removed
	    in Erlang/OTP R17B when UTF-8 becomes the default
	    encoding. </p>
          <p>
	    Own Id: OTP-10630</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.4.4.2</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Fix typo in ET doc (Thanks to Ricardo Catalinas Jiménez)</p>
          <p>
	    Own Id: OTP-10119</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.4.4.1</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
	    <p>The GS applications is now deprecated and will be
	    removed in the R16 release. The following GS-based
	    applications have been superseded by the Observer
	    application and will removed in R16: Appmon, Pman,
	    Tv.</p>
          <p>
	    *** POTENTIAL INCOMPATIBILITY ***</p>
          <p>
	    Own Id: OTP-9907</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.4.4</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
	    <p> Dialyzer warnings have been fixed. </p>
          <p>
	    Own Id: OTP-9470</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.4.3</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    The popup window 'contents viewer' did not display
	    properly on Windows.</p>
          <p>
	    Own Id: OTP-9238</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.4.2</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
	    <p> Fix error when module et was used in et_selector
	    trace patterns. </p>
          <p>
	    Own Id: OTP-8904</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.4.1</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
	    <p> Fixed broken links in the documentation. </p>
          <p>
	    Own Id: OTP-8796</p>
        </item>
      </list>
    </section>


    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Fixed gui crash on windows.</p>
          <p>
	    Own Id: OTP-8830</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.4</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>Thanks to Olle Mattsson the GUI parts are rewritten to
          use <c>wxWidgets</c>. For the time being it is still
          possible to use the old <c>GS</c> based version of the tool,
          but it is deprecated. The <c>wxWidgets</c> based version is
          started by default.</p>

          <p>A print function has been added, in order to enable
          printing of sequence charts.</p>

	  <p>A new tutorial has been added to the documentation. It is
	  based on <c>Jayson Vantuyl's</c> article
	  <c>http://souja.net/2009/04/making-sense-of-erlangs-event-tracer.html</c>.</p>

	  <p>The functions <c>et:trace_me/4</c> and
	  <c>et:trace_me/5</c> has been introduced in order to replace
	  the deprecated functions <c>et:report_event/4</c> and
	  <c>et:report_event/5</c>. Hopefully the new names makes it a
	  little more obvious what the intended usage of the functions
	  are.</p>

	  <p>The <c>max_events</c> configuration parameter to
	  <c>et_viewer</c> is not used any more. Now the event cache
	  in the <c>Viewer</c> only contains those events that
	  actually are displayed in the GUI.</p>

          <p>Own Id: OTP-8058</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.3.3</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
            The documentation is now built with open source tools
            (xsltproc and fop) that exists on most platforms. One
            visible change is that the HTML frames are removed.</p>
          <p>
            Own Id: OTP-8201</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.3.2</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
            The start module in the app file has been corrected.</p>
          <p>
            Own Id: OTP-8078</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.3.1</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
            Changed copyright</p>
          <p>
            Own Id: OTP-7830</p>
        </item>
      </list>
    </section>

</section>

<section><title>ET 1.3</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
            Adjusted copyright</p>
          <p>
            Own Id: OTP-6985</p>
        </item>
      </list>
    </section>

</section>

  <section>
    <title>ET 1.0.1</title>

    <section>
      <title>Improvements and New Features</title>
      <list type="bulleted">
        <item>
          <p>Document source changed from SGML to XML.</p>
          <p>Own Id: OTP-6774</p>
        </item>
      </list>
    </section>
  </section>

  <section>
    <title>ET 1.0.0.1</title>

    <section>
      <title>Improvements and New Features</title>
      <list type="bulleted">
        <item>
          <p>Minor Makefile changes.</p>
          <p>Own Id: OTP-6689</p>
        </item>
      </list>
    </section>
  </section>

  <section>
    <title>Event Tracer (ET) 1.0</title>

    <section>
      <title>Improvements and new features</title>
      <p>This is the first release of the <c>Event Tracer (ET)</c> as
      a stand-alone application separated from the Megaco application.</p>
    </section>
  </section>
</chapter>

