Use of set and escapes while no images in memory!
(does not include %[fx:...] and %[pixel:...] yet.

diff --git a/config/english.xml b/config/english.xml
index 2a0532f..317f071 100644
--- a/config/english.xml
+++ b/config/english.xml
@@ -954,6 +954,9 @@
         <message name="InvalidSetting">
           invalid setting
         </message>
+        <message name="NoImageForProperty">
+          no image to apply a property
+        </message>
         <message name="NoSuchElement">
           no such element in list
         </message>