Error when extension present at install

[designermonkey]

( ! ) Fatal error: Call to a member function fetchStatus() on a non-object in /Users/designermonkey/Sites/domus.local.buginteractive.com/htdocs/extensions/cdi/lib/class.cdiutil.php on line 49
Call Stack
#   Time    Memory  Function    Location
1   0.0010  268712  {main}( )   ../index.php:0
2   0.0384  4117288 Installer->run( )   ../index.php:61
3   0.0401  4130112 Installer::__install( ) ../class.installer.php:139
4   3.1399  4457504 ExtensionManager::enable( ) ../class.installer.php:601
5   3.1461  4971584 extension_cdi->install( )   ../class.extensionmanager.php:295
6   3.3328  4973768 CdiUtil::hasRequiredDumpDBVersion( )    ../extension.driver.php:11
7   3.3328  4973832 CdiUtil::hasDumpDBInstalled( )  ../class.cdiutil.php:54