When installing the ChannelUnity module in Magento you may get the error:
Fatal error: Class 'Camiloo_Channelunity_Model_Entity' not found in /****/****/public_html/includes/src/Mage_Core_Model_Resource_Setup.php on line 234
This is due to the Magento Compiler being enabled and this feature should always be disabled before installing new modules.
This is an easy issue to put right, all you need to do is to login to your Magento Admin Panel and go to:
System -> Tools -> Compiler
Once there you should see a "Disable" button, click this and you will get a message advising you that the compiler is now disabled.
You should now be able to install the ChannelUnity module.
Once that's done you can then re-enable the Magento Compiler if you need to.