When I take a look at line 275 of the init.php5 file it says this:

$vbulletin->pluginlist = array_merge($vbulletin->pluginlist, $vbulletin->pluginlistadmin);

When I take a look at line 3277 of the class_core.php5 file it says this:
echo "
Warning: $errstr in $errfile on line $errline
";


Now what do I do to correct this. When I disable my modifications I am able to go to my admincp and log in. But I need my modifications so now what?