theme_preprocess_node function not getting executed from template file I am trying to print action "tabs" in my node.tpl.php file. I added the preprocess function as below-

function MYTHEME_preprocess_node(&amp;$variables, $hook) {

 $variables['page_tabs'] = menu_local_tabs();


}

Then trying to print in my tpl like below. 

print $page_tabs;


But it is not getting executed at all. Infect the control is not going inside preprocess function when I am trying to exit like below-

function MYTHEME_preprocess_node(&amp;$variables, $hook) {

 echo "good bye";
 exit;


}

Any help is greatly appreciated. Thanks
For using this hook, u will have to replace MYTHEME with your theme name, like if your theme name is bartik, then your function will be

bartik_preprocess_node(&amp;$variables, $hook)


After that clear your cache, by going to Configuration >> Development >> Performance

or just write in url admin/config/development/perfromance