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<td><h1>CodeIgniter User Guide Version 2.1.1</h1></td>
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<a href="../index.html">User Guide Home</a> &nbsp;&#8250;&nbsp;
Upgrading from a Previous Version
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<h1>Upgrading From a Previous Version</h1>

<p>Please read the upgrade notes corresponding to the version you are upgrading from.</p>

<ul>
	<li><a href="upgrade_211.html">Upgrading from 2.1.0 to 2.1.1</a></li>
	<li><a href="upgrade_210.html">Upgrading from 2.0.3 to 2.1.0</a></li>
	<li><a href="upgrade_203.html">Upgrading from 2.0.2 to 2.0.3</a></li>
	<li><a href="upgrade_202.html">Upgrading from 2.0.1 to 2.0.2</a></li>
	<li><a href="upgrade_201.html">Upgrading from 2.0 to 2.0.1</a></li>
	<li><a href="upgrade_200.html">Upgrading from 1.7.2 to 2.0</a></li>
	<li><a href="upgrade_172.html">Upgrading from 1.7.1 to 1.7.2</a></li>
	<li><a href="upgrade_171.html">Upgrading from 1.7.0 to 1.7.1</a></li>
	<li><a href="upgrade_170.html">Upgrading from 1.6.3 to 1.7.0</a></li>
	<li><a href="upgrade_163.html">Upgrading from 1.6.2 to 1.6.3</a></li>
	<li><a href="upgrade_162.html">Upgrading from 1.6.1 to 1.6.2</a></li>
	<li><a href="upgrade_161.html">Upgrading from 1.6.0 to 1.6.1</a></li>
	<li><a href="upgrade_160.html">Upgrading from 1.5.4 to 1.6.0</a></li>
	<li><a href="upgrade_154.html">Upgrading from 1.5.3 to 1.5.4</a></li>
	<li><a href="upgrade_153.html">Upgrading from 1.5.2 to 1.5.3</a></li>
	<li><a href="upgrade_152.html">Upgrading from 1.5.0 or 1.5.1 to 1.5.2</a></li>
	<li><a href="upgrade_150.html">Upgrading from 1.4.1 to 1.5.0</a></li>
	<li><a href="upgrade_141.html">Upgrading from 1.4.0 to 1.4.1</a></li>
	<li><a href="upgrade_140.html">Upgrading from 1.3.3 to 1.4.0</a></li>
	<li><a href="upgrade_133.html">Upgrading from 1.3.2 to 1.3.3</a></li>
	<li><a href="upgrade_132.html">Upgrading from 1.3.1 to 1.3.2</a></li>
	<li><a href="upgrade_131.html">Upgrading from 1.3 to 1.3.1</a></li>
	<li><a href="upgrade_130.html">Upgrading from 1.2 to 1.3</a></li>
	<li><a href="upgrade_120.html">Upgrading from 1.1 to 1.2</a></li>
	<li><a href="upgrade_b11.html">Upgrading from Beta 1.0 to Beta 1.1</a></li>
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