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copied!<p>As Ben said, I don't know why you're going to put it on the observer but the problem in your case is the sequence of <code>loadLayout</code>.</p> <p>You can check your loaded layout xml by using:</p> <p><code>Mage::log(Mage::getSingleton('core/layout')->getUpdate()->asString());</code></p> <p>Pretty sure your <code><action method="setTemplate"><template>customelayout/product/view.phtml</template></code> has been overridden by other <code>setTemplate</code> that's the reason your template is not shown.</p> <pre><code>Mage_Core_Controller_Varien_Action public function loadLayout($handles=null, $generateBlocks=true, $generateXml=true) { // if handles were specified in arguments load them first if (false!==$handles && ''!==$handles) { $this->getLayout()->getUpdate()->addHandle($handles ? $handles : 'default'); } // add default layout handles for this action $this->addActionLayoutHandles(); $this->loadLayoutUpdates(); //in here: $this->getLayout()->getUpdate()->load(); if (!$generateXml) { return $this; } //event: controller_action_layout_generate_xml_before $this->generateLayoutXml(); //in here: $this->getLayout()->generateXml(); if (!$generateBlocks) { return $this; } //event: controller_action_layout_generate_blocks_before, your observer is located here $this->generateLayoutBlocks(); //in here: $this->getLayout()->generateBlocks(); $this->_isLayoutLoaded = true; return $this; } </code></pre> <p>So, you're going to modify the xml using event: <code>controller_action_layout_generate_blocks_before</code>.</p> <p>It means what you need to do is:</p> <pre><code>//add the update $layout->getUpdate()->addUpdate('<reference name="product.info"><action method="setTemplate"><template>customelayout/product/view.phtml</template></action></reference>'); //then generate the xml $layout->generateXml(); </code></pre> <p>What cause your problem is:</p> <p><code>$layout->getUpdate()->load();</code></p> <p>was called again after</p> <pre><code>$layout->getUpdate()->addUpdate('<reference name="product.info"><action method="setTemplate"><template>customelayout/product/view.phtml</template></action></reference>'); </code></pre> <p>Though it is better to use event: <code>controller_action_layout_generate_xml_before</code>. So that you don't need to generate your xml twice.</p>

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