$db->Execute throwing error

[artcoder]

Does $db->Execute does not work when called from some locations?

I wrote a custom function in ...
includes/functions/extra_functions/myfunction.php

I'm calling this function from ...
includes/english/html_includes/mytemplate/define_main_page.php

The function is throwing this error in the line "$db->Execute" ...

Fatal error: Call to a member function on a non-object in

[artcoder]

Nevermind. I forgot to put "global $db" in the function. Otherwise this works fine.