MediaWiki 1.9.3 (from tags), however, I *was* able to get the error to occur when restricting read access in LocalSettings.php:
$wgGroupPermissions['*']['read'] = false;
Thanks, it worked. Till backup I commented out this line. But the dump still not too good on windows...
Now the dump is okay in the \static directory, but with unicode filenames... Thus none of the links works, because the filenames are corrupt. Is there a way to convert page names to windows compatible ( :) format?
Regards, Akos Szabo