Index: TWiki.pm
===================================================================
--- TWiki.pm	(revision 3266)
+++ TWiki.pm	(working copy)
@@ -2118,6 +2118,18 @@
         $text =~ s/%STOPINCLUDE%.*//s;
 
     } # else is a file with relative path, e.g. $dataDir/../../path/to/non-twiki/file.ext
+    
+    # handle permission denied
+    # FIXME: The following breaks if spec of readTopicRaw() changes
+    if( $text =~ /^No permission to read topic/ ) {
+        if( $warn || TWiki::Prefs::getPreferencesFlag( "INCLUDEWARNING" ) ) {
+            if ( $warn =~ /^(off|no)$/i ) {
+                $text = "";
+            } else {
+                $text = "Warning: Permission denied to view/include topic.";
+            }
+        }
+    }
 
     $text = applyPatternToIncludedText( $text, $pattern ) if( $pattern );