Line 30 seems to be this, right?

$result = $DB->get_results( "SELECT * FROM $tablesettings" );

Then the problem is there's no DB object.

And that would be strange, because _config.php is included at the beginning of getmail.php.

Is pseudo-cron invoked by the webserver/through a page-hit? Or is it called through PHP's CLI (command line interface)?

You should try setting

error_reporting(E_ALL);
ini_set( 'display_errors', 'On' );

at the top of "pseudo-cron" and see if it outputs anything (despite the current fatal error).

Psudeo-cron is invoked with an include statement on a web page. As I stated, it runs OK when I type it in as http://webpage/htsrv/getmail.php. That's what has me stumped. The database is there, getmail reads it correctly when involked via the http line, but not from the include statement for psuedo-cron to involk getmail.