diff --git a/pmwiki_recipes/pim_functions.php b/pmwiki_recipes/pim_functions.php
index 65cb0d2..1d5be72 100644
--- a/pmwiki_recipes/pim_functions.php
+++ b/pmwiki_recipes/pim_functions.php
@@ -1,18 +1,19 @@
 <?php
-// PIM functions (for PmWiki)
-// 	consider adding other related scripts here too (e.g. MemoryRecipe, Recalls, GroupStats, Coeditions, ...)
-//		http://fabien.benetou.fr/pub/graphformatexporter.php.txt
-//		http://fabien.benetou.fr/pub/memorization.php.txt
-//		note that the order is important though
-//			e.g. currently MemoryRecipe is loaded after thus can't be called here
-// 	add to http://fabien.benetou.fr/repository/
-//	it would be particularly useful to refactor each properly
-//		especially since they share variables (e.g. first edit) but also some have better function
-//			e.g. caching in Coeditions
-// 	change ProcessingJS generation by first producing JSON
-//		via http://www.php.net/manual/en/function.json-encode.php
-//		cf http://fabien.benetou.fr/Tools/Processing and http://fabien.benetou.fr/Tools/JavaScript
-//		this might be even faster on most computers since JS engines are improving
+/* PIM functions (for PmWiki)
+ 	consider adding other related scripts here too (e.g. MemoryRecipe, Recalls, GroupStats, Coeditions, ...)
+		http://fabien.benetou.fr/pub/graphformatexporter.php.txt
+		http://fabien.benetou.fr/pub/memorization.php.txt
+		note that the order is important though
+			e.g. currently MemoryRecipe is loaded after thus can't be called here
+ 	add to http://fabien.benetou.fr/repository/
+	it would be particularly useful to refactor each properly
+		especially since they share variables (e.g. first edit) but also some have better function
+			e.g. caching in Coeditions
+ 	change ProcessingJS generation by first producing JSON
+		via http://www.php.net/manual/en/function.json-encode.php
+		cf http://fabien.benetou.fr/Tools/Processing and http://fabien.benetou.fr/Tools/JavaScript
+		this might be even faster on most computers since JS engines are improving
+*/
 
 //handle implicit linking
 /*
@@ -63,6 +64,9 @@ http://www.scholarpedia.org/article/Spike-response_model is probably too complic
 function DisplayVisualEdits($pagename){
         global $ScriptUrl, $PubDir, $FarmD;
 
+	# equivalent to 404
+	if (!PageExists($pagename)) return;
+
         $processingpath = '/pub/libraries/processing.js';
         $processingfile = "/pub/visualization/edits_per_page/$pagename.pjs";
         $processinglib = "<script src=\"$processingpath\" type=\"text/javascript\"></script>";