Unable to override Magento Adminhtml Block

Question

I've been going around in circles here trying to find reason why my block is not loading when i extend it. Can you help me to extend it Original file is

app/code/core/Mage/Adminhtml/Block/Catalog/Product/Attribute/Edit/Tab/Options.php

my file

app/code/local/Comp/Module/Block/Adminhtml/Catalog/Product/Attribute/Edit/Tab/Options.php

comp_module/app/code/local/Comp/Module/etc/config.xml

<?xml version="1.0" encoding="UTF-8"?>

<config>
    <modules>
        <Comp_Module>
            <version>0.1.0</version>
        </Comp_Module>
    </modules>
    <global>
        <blocks>
            <module>
                <class>Comp_Module_Block</class>
            </module>
            <adminhtml>
                <rewrite>
                    <catalog_product_attribute_edit_tab_options>Comp_Module_Block_Adminhtml_Catalog_Product_Attribute_Edit_Tab_Options</catalog_product_attribute_edit_tab_options>
                </rewrite>
            </adminhtml>
        </blocks>
    </global>
</config>

app/etc/modules/Comp_Module.xml

<?xml version="1.0" encoding="UTF-8"?>
<config>
    <modules>
        <Comp_Module>
            <active>true</active>
            <codePool>local</codePool>
        </Comp_Module>
    </modules>
</config>

Answer 1

Update your app\code\local\Comp\Module\Block\Adminhtml\Catalog\Product\Attribute\Edit\Tab\Options.php file with below code.

<?php
class Comp_Module_Block_Adminhtml_Catalog_Product_Attribute_Edit_Tab_Options extends Mage_Adminhtml_Block_Catalog_Product_Attribute_Edit_Tab_Options
{

}

Re-compile if you have compilation enabled.

Refresh your cache.