Hi qm777,
I am still writing the wiki documentation (coming soon)

. Here is the extract regarding the errors messages of the version 1.7:
==Error messages==
AjaxSearch version is not defined. Please check the snippet code in MODx manager.
means that the snippet code in the manager is not properly installed or has changed and doesn’t fit with the snippet source folder (includes/snippet.ajaxSearch.inc.php)
AjaxSearch version is obsolete. Please check the snippet code in MODx manager.
means that you the version of the snippet code in the manager doesn’t fit with the version of the snippet source folder (includes/snippet.ajaxSearch.inc.php)
AjaxSearch setup path is not defined. Please check the snippet code in MODx manager.
means that the snippet code in the manager is not properly installed or has changed and doesn’t fit with the snippet source folder (includes/snippet.ajaxSearch.inc.php)
AjaxSearch version obsolete. Check the version of AjaxSearch.js file
means that your version of the snippet source folder (includes/snippet.ajaxSearch.inc.php) doesn’t fit with the js/ajaxSearch.js file
AjaxSearch: database_connection_charset not set. Check your config file
means that your $database_connection_charset variable of your /manager/includes/config.inc.php file should be set
AjaxSearch: database_connection_charset is null. Check your config file
means that your $database_connection_charset variable of your /manager/includes/config.inc.php file is an empty value
AjaxSearch: unknown database_connection_charset = something. Add the appropriate Html charset mapping in the ajaxSearch.php file
is not an error but need that you add in the ajaxSearch.php file the mapping between the mysql database charset and the html charset. e.g: ’latin1’ => ’ISO-8859-1’,
Tell me if these explanations are insufficient or inadequate.