« MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« PHP Parse Error »
 
PHP error debug
  Error: Invalid argument supplied for foreach() 
  Error type/ Nr.: Warning - 2 
  File: /usr/www/users/schulw/assets/snippets/schultz/getFilterValues.php 
  Line: 67 
  Line 67 source: foreach( $aAllFilterValues[$filterid] as $sValue ) {  
 
Parser timing
  MySQL: 0.0057 s(135 Requests)
  PHP: 0.0465 s 
  Total: 0.0522 s