Rahul Ravi

   Vqmod Necessary Code Tags are:-         <id> Extension Name </id>    <version> 1.0.0 </version>    <vqmver> 2.1.5 </vqmver>    <author> Ravi </author>    2.  Ocmod Necessary Code Tags are:-          <name> Extension Name </name>    <version> 1.0.0 </version>    <link> http://opencart.devinlabs.com </link>    <author> Ravi </author>    <code> extension_uniq_code_name </code> ******** Major Differences between Vqmod and Ocmod *********** In Vqmod we Use  "Name" for the file full path but for Ocmod we Use "Path"                             i.e:- Vqmod =      <file name="catalog/controller/common/seo_url.php" error="skip">                          Ocmod =     <file path="admin/view/template/catalog/product_form.tpl">                                        in Ocmod and Vqmod

I got error " you don't have permission to modify this page" error. ater saving User Permission page. I found some module contains html, css, pdf, or unmannered php files( Like some php file have no classes). for fixing this I removed that modules from admin controller folder after that it solved :)