I have the source for vb4.1.2 PL6 but don't see anything at line 712 that would do that. Can you look at your includes/functions.php and see what's around line 712?
You could increase the max execution time by putting this code somewhere:
Code:
ini_set('max_execution_time', 60);
(of course you can use whatever value you want instead of 60). includes/config.sys might be a good place to put it. But if there's something wrong then increasing the max execution time might just make it take longer before displaying an error (and use more server time).