It will be issue in translate="label" syntax
<page_my_custom_page translate="label">
<label>All One-Column Layout Pages</label>
<reference name="root">
<action method="setTemplate"><template>page/custom-page.phtml</template></action>
<!-- Mark root page block that template is applied -->
<action method="setIsHandle"><applied>1</applied></action>
</reference>
<reference name="head">
<action method="addCss"><stylesheet>css/mycustom.css</stylesheet></action>
</reference>
</page_my_custom_page>
Also , check file paths...
More details you check ,please the link--
Also the blog file easylife_layout.xml
please change here-
<?xml version="1.0"?>
<layout>
<my_custom_page translate="label">
<label>Custom layout</label>
<reference name="root">
<action method="setTemplate"><templatepage/custom-page.phtml</template></action>
<action method="setIsHandle"><applied>1</applied></action>
</reference>
<reference name="head">
<action method="addCss"><stylesheet>css/mycustom.css</stylesheet></action>
</reference>
</my_custom_page>
</layout>
You are trying to define an invalid handler and block in checkout.xml.
You are using a handler that magento do not understand. i e.
<checkout_onepage_pay />
What you have done here is you are used an invalid handler instead of actual handler <checkout_onepage_failure />. Magento looks for this handler when onepage checkout fails. When magento enquires handler, its not present in your layout file. Hence it throws an error.
Also your block is also invalid (Most probly). i e
<block type="checkout/onepage_pay" name="checkout.pay" template="checkout/onepage/pay.phtml"/>
This block tells magento that, whenever a onepage checkout failure occurs (Assumes your handler is <checkout_onepage_failure />), you have to look for a block Mage_Checkout/Block/Onepage/Pay.php . Hence Magento fails to load this block type, since it is not defined. In default case the block that magento looking for will be Mage/Checkout/Block/Onepage/Failure.php and it DOES exist.
From your question, its difficult to understand what you are looking for. There may be two cases
- You are trying to create a custom checkout onepage failure template
If that is the case you have to do this handler.
<checkout_onepage_failure translate="label">
<label>One Page Checkout Failure</label>
<reference name="root">
<action method="setTemplate"><template>page/2columns-right.phtml</template></action>
</reference>
<reference name="content">
<block type="checkout/onepage_failure" name="checkout.failure" template="path/to/your/custom/template.php"/>
</reference>
</checkout_onepage_failure>
You just need to alter the template part of default block.
- You may trying to set a payment method page
If that is the case, then you need to use this handler
<checkout_onepage_paymentmethod>
<remove name="right"/>
<remove name="left"/>
<block type="checkout/onepage_payment_methods" name="root" output="toHtml" template="checkout/onepage/payment/methods.phtml">
<action method="setMethodFormTemplate"><method>purchaseorder</method><template>payment/form/purchaseorder.phtml</template></action>
</block>
</checkout_onepage_paymentmethod>
This code snippet is from app/design/frontend/base/default/layout/checkout.xml. Make changes to content of this handler.
Note: Whatever be the reason, it is not a good practice to change the the files that resides in the location app/design/frontend/base/default. Set a new package and theme and make changes to the directory app/design/frontend/<your_package>/<your_theme>/
Best Answer
Your approach is the correct one, i think the identifier
<opc_index_index>might be wrong. Double check the extension XML to see how is the extension adding the CSS to the OPC pag. Also flush your cache since XMLs are often cached.