« MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« PHP Parse Error »
 
PHP error debug
  Error: include_once() [function.include-once]: Unable to allocate memory for pool. 
  Error type/ Nr.: Warning - 2 
  File: /services/webpages/util/p/o/polyhe.attwebspace.com/polyhedronlab.com/public/manager/includes/document.parser.class.inc.php 
  Line: 195 
  Line 195 source: $included= include_once (MODX_BASE_PATH . 'assets/cache/siteCache.idx.php');  
 
Parser timing
  MySQL: 0.0056 s(0 Requests)
  PHP: 0.1291 s 
  Total: 0.1348 s