By timtait on

Hey I have my website running fine but once or twice a day it shows a white screen of death and the only way to get it going again is to kill the php-cgi.exe process from the task manager.

I have looked at the php error log and I get these errors

[08-Jul-2010 19:39:45] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:40:33] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:40:33] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:40:44] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:41:35] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:42:24] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:42:39] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:42:42] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:45:14] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:45:33] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:46:12] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:48:26] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:49:07] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:49:45] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:51:24] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:51:51] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:53:18] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:54:14] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 19:56:52] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:00:08] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:00:09] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:00:25] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:00:34] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:00:59] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:01:47] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:03:16] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:03:21] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:03:58] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:04:56] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:04:58] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:04:59] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:04:59] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:05:00] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:05:00] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:05:04] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:05:05] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:05:05] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:05:05] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:05:06] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:05:06] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:05:06] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:06:10] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:06:54] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:07:31] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16
[08-Jul-2010 20:08:05] PHP Fatal error: Call to undefined function drupal_bootstrap() in \index.php on line 16

Line 16 in index.php shows

drupal_bootstrap(DRUPAL_BOOTSTRAP_FULL);

Does anyone have any ideas of why this suddenly happens?

Thanks

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