Got a bit of a puzzle here... error message says that

require(includes/templates/template_default/templates/tpl_product_music_default.php): failed to open stream: No such file or directory in /includes/templates/template_default/common/tpl_main_page.php on line 122

Fine - that tells me (not surprisingly!) that there's no file named tpl_product_music_default.php which is being called from line 122 in tpl_main_page.php

The problem is that line 122 is
Code:
require($body_code);
Using developer-toolkit to locate tpl_product_music_default.php brings up zero returns ... so, how do I go about trying to identify where this error starts?