At http://www.linux.com/archive/articles/141081 I got the insight to increase the PHP memory in the php.ini file. That seems to have been the limitation that was preventing Extension:Collection and Extension:PdfBook from PDF rendering via the pediapress.com site. in php.ini: ; Maximum amount of memory a script may consume (128MB) ; http://php.net/memory-limit ; memory_limit = 128M **what it was** memory_limit = 384M ---------- Forwarded message ---------- From: Raymond M <raymondsgroupmail(a)gmail.com> Date: Tue, Oct 12, 2010 at 3:40 PM Subject: my Mediawiki installation is not rendering books To: mediawiki-l(a)lists.wikimedia.org I had great help yesterday, so here goes today's question. My mediawiki installation allows me to assign article pages to a Book, save the Book, but not to download a .pdf or .odt == MediaWiki 1.16.0 == 2010-07-28 I have in my LocalSettings.php (yes, some commented out lines) ... require_once("$IP/extensions/Collection/Collection.php"); $wgCollectionFormats = array( 'rl' => 'PDF', 'odf' => 'ODT',); #$wgUseAjax = true; #require_once("{$IP}/extensions/CategoryTree/CategoryTree.php"); #require_once("{$IP}/extensions/Book/Book.php"); require_once("{$IP}/extensions/PdfBook/PdfBook.php"); $wgGroupPermissions['user']['collectionsaveasuserpage'] = true; $wgGroupPermissions['user']['collectionsaveascommunitypage'] = true; When I am in the Manage Book I can add pages, see them listed as part of the book, but when I click the download (either .pdf or .odt) the browser screen goes blank.  I have made no attempt to move the mw-render to the local machine, at least not so far.  My firewall and port settings are just those per the Ubuntu 10.10 installation. root@ubuntu1010servervm:/home/raymond# ping www.pediapress.com PING www.pediapress.com (178.63.45.9) 56(84) bytes of data. 64 bytes from pediapress.com (178.63.45.9): icmp_req=1 ttl=53 time=177 ms 64 bytes from pediapress.com (178.63.45.9): icmp_req=2 ttl=53 time=179 ms 64 bytes from pediapress.com (178.63.45.9): icmp_req=3 ttl=53 time=178 ms Perhaps there is a standalone .php script I can attempt to debug the problem.  Or can someone point me to better instructions on the mw-render installation.