Thread:Help talk:Installation/Re: Warning: Class '…' not found in …

I got the same error message with an older version of Validator, but the latest ?stable version produces something like "Fatal error: Validator depends on the ParamProcessor library" (see also mediawiki.org). Commenting out Validator in localsettings.php helps at least to get past the error message, but new ones immediately present themselves at the bottom of the page (internal errors and some messages concerning header information). So should Validator be explicitly evoked or not in this case? What about DataValues?

MW 1.19.7 / SMW 1.9 / SF 1.5.2 / MySQL 5.1.72-2, Php 5.3.3-7